Bluetooth-compatible adapter uses driver-free plug and play design, which is convenient for you to operate.The signal transmission is fast, stable and barrier-free as it uses Bluetooth-compatible 5.0 technology.Made of ABS high quality material, it is lightweight and wear-resistant.The length of this product is 6cm, the width is 3.7cm and the height is 1.7cm.It is suitable for headphone, PC, home audio, video, car, office, etc.Item Name: Bluetooth-compatible AdapterMaterial: ABSColor: BlackModel: B31Audio Cable Length: 45cmUSB Cable Length: 48cmBluetooth-compatible Version: V5.0Support Protocol: A2DP, AVRCP, HFP, HSPWorking Frequency: 2.402GHz -2.480GHzPower Level: 2 (Class II)Receiving Sensitivity: -90dB at 0.1% BERWorking Current: ＜30MA (Screen Off)Battery: 250mAh (Included)Charging Current: about 200MACharging Time: about 2 HoursLife Time: >10HBluetooth-compatible Distance: >10M (Open Place)Charging Method: Micro USB 5VOutput Connection Mode: 3.5MM Stereo InterfaceWork Display Screen Display Content: Bluetooth-compatible Connection Status, Playback Status, Volume Value, Power Value, Device Name, Music SpectrumCompatible: Compatible for Android, for iOS System Mobile Phones and PAD, and Other Audio Equipment with AUX Input FunctionFeatures: Portable, Stable Transmission, StereoSize Details: 6cm x 3.7cm x 1.7cm/2.36" x 1.46" x 0.67" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bluetooth-compatible Adapter1 x USB Cable1 x Audio Cable1 x User Manual