diff --git a/Assets/CoreBluetooth/Samples/12_Debug/SampleDebug_Central.cs b/Assets/CoreBluetooth/Samples/12_Debug/SampleDebug_Central.cs
index 7deb56b..b62a7b1 100644
--- a/Assets/CoreBluetooth/Samples/12_Debug/SampleDebug_Central.cs
+++ b/Assets/CoreBluetooth/Samples/12_Debug/SampleDebug_Central.cs
@@ -125,6 +125,11 @@ public void DidWriteValueForCharacteristic(CBPeripheral peripheral, CBCharacteri
             }
         }
 
+        public void IsReadyToSendWriteWithoutResponse(CBPeripheral peripheral)
+        {
+            Debug.Log($"[IsReadyToSendWriteWithoutResponse] {peripheral}");
+        }
+
         public void DidUpdateNotificationStateForCharacteristic(CBPeripheral peripheral, CBCharacteristic characteristic, CBError error)
         {
             Debug.Log($"[DidUpdateNotificationStateForCharacteristic] characteristic: {characteristic}");
@@ -149,9 +154,14 @@ public void OnClickWrite()
                 return;
             }
 
+            if (!_peripheral.CanSendWriteWithoutResponse)
+            {
+                Debug.Log("CanSendWriteWithoutResponse is false.");
+                return;
+            }
             var value = UnityEngine.Random.Range(100, 1000).ToString();
             var data = Encoding.UTF8.GetBytes(value);
-            _peripheral.WriteValue(data, _remoteCharacteristic, CBCharacteristicWriteType.WithResponse);
+            _peripheral.WriteValue(data, _remoteCharacteristic, CBCharacteristicWriteType.WithoutResponse);
         }
 
         public void OnClickRead()
diff --git a/Assets/CoreBluetooth/Samples/12_Debug/SampleDebug_Peripheral.cs b/Assets/CoreBluetooth/Samples/12_Debug/SampleDebug_Peripheral.cs
index 6af0ae9..dd31f5c 100644
--- a/Assets/CoreBluetooth/Samples/12_Debug/SampleDebug_Peripheral.cs
+++ b/Assets/CoreBluetooth/Samples/12_Debug/SampleDebug_Peripheral.cs
@@ -32,7 +32,7 @@ public void DidUpdateState(CBPeripheralManager peripheral)
                 var service = new CBMutableService(_serviceUUID, true);
                 _characteristic = new CBMutableCharacteristic(
                     _characteristicUUID,
-                    CBCharacteristicProperties.Read | CBCharacteristicProperties.Write | CBCharacteristicProperties.Notify,
+                    CBCharacteristicProperties.Read | CBCharacteristicProperties.WriteWithoutResponse | CBCharacteristicProperties.Notify,
                     null,
                     CBAttributePermissions.Readable | CBAttributePermissions.Writeable
                 );
diff --git a/Packages/com.teach310.core-bluetooth-for-unity/Plugins/iOS/CoreBluetoothForUnity.framework/CoreBluetoothForUnity b/Packages/com.teach310.core-bluetooth-for-unity/Plugins/iOS/CoreBluetoothForUnity.framework/CoreBluetoothForUnity
index 62db518..175ca79 100755
Binary files a/Packages/com.teach310.core-bluetooth-for-unity/Plugins/iOS/CoreBluetoothForUnity.framework/CoreBluetoothForUnity and b/Packages/com.teach310.core-bluetooth-for-unity/Plugins/iOS/CoreBluetoothForUnity.framework/CoreBluetoothForUnity differ
diff --git a/Packages/com.teach310.core-bluetooth-for-unity/Plugins/macOS/libCoreBluetoothForUnity.dylib b/Packages/com.teach310.core-bluetooth-for-unity/Plugins/macOS/libCoreBluetoothForUnity.dylib
index 2a1956f..9a8160f 100755
Binary files a/Packages/com.teach310.core-bluetooth-for-unity/Plugins/macOS/libCoreBluetoothForUnity.dylib and b/Packages/com.teach310.core-bluetooth-for-unity/Plugins/macOS/libCoreBluetoothForUnity.dylib differ
diff --git a/Packages/com.teach310.core-bluetooth-for-unity/Runtime/CBPeripheral.cs b/Packages/com.teach310.core-bluetooth-for-unity/Runtime/CBPeripheral.cs
index 754b7df..b523257 100644
--- a/Packages/com.teach310.core-bluetooth-for-unity/Runtime/CBPeripheral.cs
+++ b/Packages/com.teach310.core-bluetooth-for-unity/Runtime/CBPeripheral.cs
@@ -19,6 +19,7 @@ void DidDiscoverServices(CBPeripheral peripheral, CBError error) { }
         void DidDiscoverCharacteristics(CBPeripheral peripheral, CBService service, CBError error) { }
         void DidUpdateValueForCharacteristic(CBPeripheral peripheral, CBCharacteristic characteristic, CBError error) { }
         void DidWriteValueForCharacteristic(CBPeripheral peripheral, CBCharacteristic characteristic, CBError error) { }
+        void IsReadyToSendWriteWithoutResponse(CBPeripheral peripheral) { }
         void DidUpdateNotificationStateForCharacteristic(CBPeripheral peripheral, CBCharacteristic characteristic, CBError error) { }
     }
 
@@ -71,27 +72,44 @@ internal CBPeripheral(SafeNativePeripheralHandle nativePeripheral)
         /// Discovers the specified services of the peripheral.
         /// If the servicesUUIDs parameter is nil, this method returns all of the peripheral’s available services. This is much slower than providing an array of service UUIDs to search for.
         /// </summary>
-        public void DiscoverServices(string[] serviceUUIDs = null) => _nativePeripheral.DiscoverServices(serviceUUIDs);
+        public void DiscoverServices(string[] serviceUUIDs = null)
+        {
+            ExceptionUtils.ThrowObjectDisposedExceptionIf(_disposed, this);
+            _nativePeripheral.DiscoverServices(serviceUUIDs);
+        }
 
         /// <summary>
         /// Discovers the specified characteristics of a service.
         /// </summary>
-        public void DiscoverCharacteristics(string[] characteristicUUIDs, CBService service) => _nativePeripheral.DiscoverCharacteristics(characteristicUUIDs, service);
+        public void DiscoverCharacteristics(string[] characteristicUUIDs, CBService service)
+        {
+            ExceptionUtils.ThrowObjectDisposedExceptionIf(_disposed, this);
+            _nativePeripheral.DiscoverCharacteristics(characteristicUUIDs, service);
+        }
 
         /// <summary>
         /// Discover all characteristics in a service (slow).
         /// </summary>
-        public void DiscoverCharacteristics(CBService service) => DiscoverCharacteristics(null, service);
+        public void DiscoverCharacteristics(CBService service)
+        {
+            ExceptionUtils.ThrowObjectDisposedExceptionIf(_disposed, this);
+            DiscoverCharacteristics(null, service);
+        }
 
         /// <summary>
         /// Retrieves the value of a specified characteristic.
         /// When you call this method to read the value of a characteristic, the peripheral calls the peripheral(_:didUpdateValueFor:error:) method of its delegate object.
         /// If the peripheral successfully reads the value of the characteristic, you can access it through the characteristic’s value property.
         /// </summary>
-        public void ReadValue(CBCharacteristic characteristic) => _nativePeripheral.ReadValue(characteristic);
+        public void ReadValue(CBCharacteristic characteristic)
+        {
+            ExceptionUtils.ThrowObjectDisposedExceptionIf(_disposed, this);
+            _nativePeripheral.ReadValue(characteristic);
+        }
 
         public void WriteValue(byte[] data, CBCharacteristic characteristic, CBCharacteristicWriteType type)
         {
+            ExceptionUtils.ThrowObjectDisposedExceptionIf(_disposed, this);
             _nativePeripheral.WriteValue(data, characteristic, type);
         }
 
@@ -100,6 +118,7 @@ public void WriteValue(byte[] data, CBCharacteristic characteristic, CBCharacter
         /// </summary>
         public int GetMaximumWriteValueLength(CBCharacteristicWriteType type)
         {
+            ExceptionUtils.ThrowObjectDisposedExceptionIf(_disposed, this);
             return _nativePeripheral.GetMaximumWriteValueLength(type);
         }
 
@@ -108,6 +127,7 @@ public int GetMaximumWriteValueLength(CBCharacteristicWriteType type)
         /// </summary>
         public void SetNotifyValue(bool enabled, CBCharacteristic characteristic)
         {
+            ExceptionUtils.ThrowObjectDisposedExceptionIf(_disposed, this);
             _nativePeripheral.SetNotifyValue(enabled, characteristic);
         }
 
@@ -123,6 +143,15 @@ public CBPeripheralState State
             }
         }
 
+        public bool CanSendWriteWithoutResponse
+        {
+            get
+            {
+                ExceptionUtils.ThrowObjectDisposedExceptionIf(_disposed, this);
+                return _nativePeripheral.CanSendWriteWithoutResponse;
+            }
+        }
+
         internal CBCharacteristic FindCharacteristic(string serviceUUID, string characteristicUUID)
         {
             if (string.IsNullOrEmpty(serviceUUID))
@@ -187,6 +216,12 @@ void INativePeripheralDelegate.DidWriteValueForCharacteristic(string serviceUUID
             Delegate?.DidWriteValueForCharacteristic(this, characteristic, error);
         }
 
+        void INativePeripheralDelegate.IsReadyToSendWriteWithoutResponse()
+        {
+            if (_disposed) return;
+            Delegate?.IsReadyToSendWriteWithoutResponse(this);
+        }
+
         void INativePeripheralDelegate.DidUpdateNotificationStateForCharacteristic(string serviceUUID, string characteristicUUID, bool isNotifying, CBError error)
         {
             if (_disposed) return;
diff --git a/Packages/com.teach310.core-bluetooth-for-unity/Runtime/NativeMethods.cs b/Packages/com.teach310.core-bluetooth-for-unity/Runtime/NativeMethods.cs
index 2f67bb9..a651482 100644
--- a/Packages/com.teach310.core-bluetooth-for-unity/Runtime/NativeMethods.cs
+++ b/Packages/com.teach310.core-bluetooth-for-unity/Runtime/NativeMethods.cs
@@ -74,6 +74,7 @@ int serviceUUIDsCount
         internal delegate void CB4UPeripheralDidDiscoverCharacteristicsHandler(IntPtr peripheralPtr, IntPtr serviceUUIDPtr, IntPtr commaSeparatedCharacteristicUUIDsPtr, int errorCode);
         internal delegate void CB4UPeripheralDidUpdateValueForCharacteristicHandler(IntPtr peripheralPtr, IntPtr serviceUUIDPtr, IntPtr characteristicUUIDPtr, IntPtr dataPtr, int dataLength, int errorCode);
         internal delegate void CB4UPeripheralDidWriteValueForCharacteristicHandler(IntPtr peripheralPtr, IntPtr serviceUUIDPtr, IntPtr characteristicUUIDPtr, int errorCode);
+        internal delegate void CB4UPeripheralIsReadyToSendWriteWithoutResponseHandler(IntPtr peripheralPtr);
         internal delegate void CB4UPeripheralDidUpdateNotificationStateForCharacteristicHandler(IntPtr peripheralPtr, IntPtr serviceUUIDPtr, IntPtr characteristicUUIDPtr, int notificationState, int errorCode);
 
         [DllImport(DLL_NAME, CallingConvention = CallingConvention.Cdecl)]
@@ -83,6 +84,7 @@ internal static extern void cb4u_peripheral_register_handlers(
             CB4UPeripheralDidDiscoverCharacteristicsHandler didDiscoverCharacteristicsHandler,
             CB4UPeripheralDidUpdateValueForCharacteristicHandler didUpdateValueForCharacteristicHandler,
             CB4UPeripheralDidWriteValueForCharacteristicHandler didWriteValueForCharacteristicHandler,
+            CB4UPeripheralIsReadyToSendWriteWithoutResponseHandler isReadyToSendWriteWithoutResponseHandler,
             CB4UPeripheralDidUpdateNotificationStateForCharacteristicHandler didUpdateNotificationStateForCharacteristicHandler
         );
 
@@ -146,6 +148,10 @@ internal static extern int cb4u_peripheral_set_notify_value(
         [DllImport(DLL_NAME, CallingConvention = CallingConvention.Cdecl)]
         internal static extern int cb4u_peripheral_state(SafeNativePeripheralHandle handle);
 
+        [DllImport(DLL_NAME, CallingConvention = CallingConvention.Cdecl)]
+        [return: MarshalAs(UnmanagedType.I1)]
+        internal static extern bool cb4u_peripheral_can_send_write_without_response(SafeNativePeripheralHandle handle);
+
         [DllImport(DLL_NAME, CallingConvention = CallingConvention.Cdecl)]
         internal static extern int cb4u_peripheral_characteristic_properties(
             SafeNativePeripheralHandle handle,
diff --git a/Packages/com.teach310.core-bluetooth-for-unity/Runtime/NativePeripheralProxy.cs b/Packages/com.teach310.core-bluetooth-for-unity/Runtime/NativePeripheralProxy.cs
index ab19e0f..17ae967 100644
--- a/Packages/com.teach310.core-bluetooth-for-unity/Runtime/NativePeripheralProxy.cs
+++ b/Packages/com.teach310.core-bluetooth-for-unity/Runtime/NativePeripheralProxy.cs
@@ -132,5 +132,13 @@ internal CBPeripheralState State
                 return (CBPeripheralState)state;
             }
         }
+
+        internal bool CanSendWriteWithoutResponse
+        {
+            get
+            {
+                return NativeMethods.cb4u_peripheral_can_send_write_without_response(_handle);
+            }
+        }
     }
 }
diff --git a/Packages/com.teach310.core-bluetooth-for-unity/Runtime/SafeNativePeripheralHandle.cs b/Packages/com.teach310.core-bluetooth-for-unity/Runtime/SafeNativePeripheralHandle.cs
index 6388940..9b6cffb 100644
--- a/Packages/com.teach310.core-bluetooth-for-unity/Runtime/SafeNativePeripheralHandle.cs
+++ b/Packages/com.teach310.core-bluetooth-for-unity/Runtime/SafeNativePeripheralHandle.cs
@@ -10,6 +10,7 @@ void DidDiscoverServices(string[] serviceUUIDs, CBError error) { }
         void DidDiscoverCharacteristics(string serviceUUID, string[] characteristicUUIDs, CBError error) { }
         void DidUpdateValueForCharacteristic(string serviceUUID, string characteristicUUID, byte[] data, CBError error) { }
         void DidWriteValueForCharacteristic(string serviceUUID, string characteristicUUID, CBError error) { }
+        void IsReadyToSendWriteWithoutResponse() { }
         void DidUpdateNotificationStateForCharacteristic(string serviceUUID, string characteristicUUID, bool enabled, CBError error) { }
     }
 
@@ -32,6 +33,7 @@ void RegisterHandlers()
                 DidDiscoverCharacteristics,
                 DidUpdateValueForCharacteristic,
                 DidWriteValueForCharacteristic,
+                IsReadyToSendWriteWithoutResponse,
                 DidUpdateNotificationStateForCharacteristic
             );
         }
@@ -112,6 +114,12 @@ internal static void DidWriteValueForCharacteristic(IntPtr peripheralPtr, IntPtr
             );
         }
 
+        [AOT.MonoPInvokeCallback(typeof(NativeMethods.CB4UPeripheralIsReadyToSendWriteWithoutResponseHandler))]
+        internal static void IsReadyToSendWriteWithoutResponse(IntPtr peripheralPtr)
+        {
+            GetDelegate(peripheralPtr)?.IsReadyToSendWriteWithoutResponse();
+        }
+
         [AOT.MonoPInvokeCallback(typeof(NativeMethods.CB4UPeripheralDidUpdateNotificationStateForCharacteristicHandler))]
         internal static void DidUpdateNotificationStateForCharacteristic(IntPtr peripheralPtr, IntPtr serviceUUIDPtr, IntPtr characteristicUUIDPtr, int notificationState, int errorCode)
         {
diff --git a/Plugins/CoreBluetoothForUnity/Sources/CoreBluetoothForUnity/CB4UPeripheral.swift b/Plugins/CoreBluetoothForUnity/Sources/CoreBluetoothForUnity/CB4UPeripheral.swift
index e7154d3..aceb531 100644
--- a/Plugins/CoreBluetoothForUnity/Sources/CoreBluetoothForUnity/CB4UPeripheral.swift
+++ b/Plugins/CoreBluetoothForUnity/Sources/CoreBluetoothForUnity/CB4UPeripheral.swift
@@ -7,6 +7,7 @@ public class CB4UPeripheral : NSObject {
     public var didDiscoverCharacteristicsHandler: CB4UPeripheralDidDiscoverCharacteristicsHandler?
     public var didUpdateValueForCharacteristicHandler: CB4UPeripheralDidUpdateValueForCharacteristicHandler?
     public var didWriteValueForCharacteristicHandler: CB4UPeripheralDidWriteValueForCharacteristicHandler?
+    public var isReadyToSendWriteWithoutResponseHandler: CB4UPeripheralIsReadyToSendWriteWithoutResponseHandler?
     public var didUpdateNotificationStateForCharacteristicHandler: CB4UPeripheralDidUpdateNotificationStateForCharacteristicHandler?
     
     let success: Int32 = 0
@@ -93,6 +94,10 @@ public class CB4UPeripheral : NSObject {
     public var state: CBPeripheralState {
         return peripheral.state
     }
+    
+    public var canSendWriteWithoutResponse: Bool {
+        return peripheral.canSendWriteWithoutResponse
+    }
 }
 
 extension CB4UPeripheral : CBPeripheralDelegate {
@@ -144,6 +149,10 @@ extension CB4UPeripheral : CBPeripheralDelegate {
         }
     }
     
+    public func peripheralIsReady(toSendWriteWithoutResponse peripheral: CBPeripheral) {
+        isReadyToSendWriteWithoutResponseHandler?(selfPointer())
+    }
+    
     public func peripheral(_ peripheral: CBPeripheral, didUpdateNotificationStateFor characteristic: CBCharacteristic, error: Error?) {
         let serviceId = characteristic.service?.uuid.uuidString ?? ""
         let characteristicId = characteristic.uuid.uuidString
diff --git a/Plugins/CoreBluetoothForUnity/Sources/CoreBluetoothForUnity/CoreBluetoothForUnity.swift b/Plugins/CoreBluetoothForUnity/Sources/CoreBluetoothForUnity/CoreBluetoothForUnity.swift
index 614f19a..54e3f88 100644
--- a/Plugins/CoreBluetoothForUnity/Sources/CoreBluetoothForUnity/CoreBluetoothForUnity.swift
+++ b/Plugins/CoreBluetoothForUnity/Sources/CoreBluetoothForUnity/CoreBluetoothForUnity.swift
@@ -116,6 +116,7 @@ public typealias CB4UPeripheralDidDiscoverServicesHandler = @convention(c) (Unsa
 public typealias CB4UPeripheralDidDiscoverCharacteristicsHandler = @convention(c) (UnsafeRawPointer, UnsafePointer<CChar>, UnsafePointer<CChar>, Int32) -> Void
 public typealias CB4UPeripheralDidUpdateValueForCharacteristicHandler = @convention(c) (UnsafeRawPointer, UnsafePointer<CChar>, UnsafePointer<CChar>, UnsafePointer<UInt8>, Int32, Int32) -> Void
 public typealias CB4UPeripheralDidWriteValueForCharacteristicHandler = @convention(c) (UnsafeRawPointer, UnsafePointer<CChar>, UnsafePointer<CChar>, Int32) -> Void
+public typealias CB4UPeripheralIsReadyToSendWriteWithoutResponseHandler = @convention(c) (UnsafeRawPointer) -> Void
 public typealias CB4UPeripheralDidUpdateNotificationStateForCharacteristicHandler = @convention(c) (UnsafeRawPointer, UnsafePointer<CChar>, UnsafePointer<CChar>, Int32, Int32) -> Void
 
 @_cdecl("cb4u_peripheral_register_handlers")
@@ -125,6 +126,7 @@ public func cb4u_peripheral_register_handlers(
     _ didDiscoverCharacteristicsHandler: @escaping CB4UPeripheralDidDiscoverCharacteristicsHandler,
     _ didUpdateValueForCharacteristicHandler: @escaping CB4UPeripheralDidUpdateValueForCharacteristicHandler,
     _ didWriteValueForCharacteristicHandler: @escaping CB4UPeripheralDidWriteValueForCharacteristicHandler,
+    _ isReadyToSendWriteWithoutResponseHandler: @escaping CB4UPeripheralIsReadyToSendWriteWithoutResponseHandler,
     _ didUpdateNotificationStateForCharacteristicHandler: @escaping CB4UPeripheralDidUpdateNotificationStateForCharacteristicHandler
 ) {
     let instance = Unmanaged<CB4UPeripheral>.fromOpaque(peripheralPtr).takeUnretainedValue()
@@ -133,6 +135,7 @@ public func cb4u_peripheral_register_handlers(
     instance.didDiscoverCharacteristicsHandler = didDiscoverCharacteristicsHandler
     instance.didUpdateValueForCharacteristicHandler = didUpdateValueForCharacteristicHandler
     instance.didWriteValueForCharacteristicHandler = didWriteValueForCharacteristicHandler
+    instance.isReadyToSendWriteWithoutResponseHandler = isReadyToSendWriteWithoutResponseHandler
     instance.didUpdateNotificationStateForCharacteristicHandler = didUpdateNotificationStateForCharacteristicHandler
 }
 
@@ -258,6 +261,13 @@ public func cb4u_peripheral_state(_ peripheralPtr: UnsafeRawPointer) -> Int32 {
     return Int32(instance.state.rawValue)
 }
 
+@_cdecl("cb4u_peripheral_can_send_write_without_response")
+public func cb4u_peripheral_can_send_write_without_response(_ peripheralPtr: UnsafeRawPointer) -> Bool {
+    let instance = Unmanaged<CB4UPeripheral>.fromOpaque(peripheralPtr).takeUnretainedValue()
+    
+    return instance.canSendWriteWithoutResponse
+}
+
 @_cdecl("cb4u_peripheral_characteristic_properties")
 public func cb4u_peripheral_characteristic_properties(
     _ peripheralPtr: UnsafeRawPointer,