Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The BluetoothRemoteGATTDescriptor interface of the Web Bluetooth API provides a GATT Descriptor, which provides further information about a characteristic’s value.

Note: This page describes the W3C Community Group Web Bluetooth API. For the Firefox OS Bluetooth API, see BluetoothGattDescriptor (Firefox OS).


BluetoothRemoteGATTDescriptor.characteristicRead only

Returns the BluetoothRemoteGATTCharacteristic this descriptor belongs to.

BluetoothRemoteGATTDescriptor.uuidRead only

Returns the UUID of the characteristic descriptor, for example '00002902-0000-1000-8000-00805f9b34fb' for theClient Characteristic Configuration descriptor.

BluetoothRemoteGATTDescriptor.valueRead only

Returns the currently cached descriptor value. This value gets updated when the value of the descriptor is read.



Returns a Promise that resolves to an ArrayBuffer holding a duplicate  of the value property if it is available and supported. Otherwise it throws an error.


Sets the value property to the bytes contained in an ArrayBuffer and returns a Promise.


Web Bluetooth
# bluetoothgattdescriptor-interface

Browser compatibility

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