2 in1 Design By using this wireless adapter, you can send and receive all of the audio freely and easily. Transmitter enables your TV, AV Receiver, Radio and other home audio source devices to stream music to your Bluetooth headphones or speakers; Receiver lets non-Bluetooth devices like your home stereo or AV Receiver and wirelessly stream music from your cellphone/PC.4 Hours of Battery Life The working time of this aux bluetooth receiver is up to 4 hours when making calls or playing music. And it takes only 1.5 hours to fully charge the device by using a USB fast charging cable (Included in the package). In addition, this Bluetooth music adapter can be used while charging, which is very convenientClear Soundoffers you 10M operation range with good performance, gives you a good experience when answering the phone or watching late-night shows. In order to get clear sound, we recommend NOT using the Bluetooth transmitter-receiver while charging.Wireless FunctionWant to watch football/baseball / Boxing / Golf / NBA game late at night without waking anyone up? This is a great chose for you. Bluetooth transmitter function wirelessly streams audio to Bluetooth speakers or headphones from your TV or older media devices like portable CD players that lack built-in Bluetooth.Wide Compatibility: Bluetooth 5.0 Receiver compatible with most smartphones, ideal for home or vehicle audio systems. (Like: computer, TV, projector (transmit mode)/speaker, earphone (receive mode).