Driver-free and easy to use: no need to install the driver, Bluetooth fast connection, more convenient to use, phones / tablets can be used to transfer text, photos. Design Bluetooth 5.0: Using the advanced Bluetooth 5.0 module, high-quality sound effects can be achieved through A2DP and AVRCP, and the built-in AEC cancellation and ANC noise cancellation circuit allows you to enjoy beautiful stereo and pure without wiring or quietly watch Play TV without disturbing your family. Simple to use: just press the switch to switch between transmitter and receiver modes. Using advanced Bluetooth technology and 3.5mm audio cable (included) for easy connection. Small and light: the size of this Bluetooth adapter is about 62*25*13.3 mm/2.44*0.98*0.52inch and its weight is about 30g. You can easily listen to music via Bluetooth anytime, anywhere. Wide Compatibility: With the included 3.5mm cable and 3.5mm to 2RCA cable, this audio transmitter receiver 2 in 1 can be widely used for your PC, laptop, home stereo system, headphone, smart phone, MP3 player, CD player, etc.