2-in-1: This kind of device is designed with transmitting and receiving functions, so it helps to make your device have bluetooth-compatible function, you can order according to your needs.Wireless: This receiver works with bluetooth-compatible V5.0 technology, which ensures a stable connection and clear sound, giving you a good listening experience.Easy connection: The 3.5mm Aux cable makes it easy for you to connect the adapter to the audio device, suitable for home, car and other places.Application: This bluetooth-compatible receiver is suitable for cellphone, computer, tablet and other devices, you can enjoy music on your device.USB rechargeable: This audio transmitter can be used for about 8 hours after being charged for about 2 hours, you do not need to charge it frequently, saving your time and strength.Specification:Color: black.Size: show as pictures. Bluetooth-compatible version: V5.0.Bluetooth-compatible range: approx. 10m/393.7inch.Bluetooth-compatible protocol: A2DP, AVRCP.Current: 600MA.Work time: about 8 hours.Charging input voltage: DC5V.Charging time: about 2 hours.Transferring speed: 4Mbps.Effective work semidiameter: approx. 10m/393.7inch.Work frequency: 2480MHz.Note:Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow a slight deviation for the measurement data and make sure you do not mind before ordering.Package Includes:1 Piece Audio Transmitter Receiver(with 1 Piece 3.5mm AUX Cable, 1 Piece USB Charging Cable, 1 Piece User Manual).