Bluetooth 5.3: Wired earphones become wirelessbluetooth earphones in seconds, to /watching /learning/games in multiple scenes,Bluetooth wireless connection is more convenient. Connect the car audio: Wirelessly listen to musicand enjoy it as you like, Connect the mobile phone to the car stereo , play audio wirelessly ,listen to the music in the mobile phone , and enjoy the good sound as you like. Connecting vintage speakers: -fashioned audio becomesbluetooth audio in seconds. Only 3.5mm interface connection can make speakers have Bluetooth function. Long battery life: One charge can be used for 16 hours. Built-in 200mah rechargeable lithium battery , charge for 2 music for 16 hourslonger battery life , can be used while charging whenthe battery is low , convenient and worry-free. Material: plastic colour: As shown Package Contents: 1 x Bluetooth Receiver 1 x USB Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.