Clear Soundprovides you 10M working 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 that you DO NOT use the Bluetooth transceiver while charging. 2 in 1 Design By using this wireless adapter, you can send and receive all audio freely and easily. The transmitter allows your TV, AV receiver, radio and other home audio devices to stream music to your Bluetooth headphones or speakers; The receiver allows non-Bluetooth devices like your home stereo or AV receiver to stream music wirelessly from your cell phone/PC. Wireless Function Want to watch a football game / baseball / boxing / golf / NBA late at night without waking anyone? It is a great choice for you. The Bluetooth transmitter feature wirelessly streams audio to Bluetooth speakers or headphones from your TV or older media devices such as portable CD players that lack built-in Bluetooth. < p>4 Hours Battery LifeThe working time of this aux bluetooth receiver can be up to 4 hours when making calls or listening to music. And it only takes 1.5 hours to fully charge the device using a USB fast charging cable (included in the package). In addition, this Bluetooth music adapter can be used while charging, which is very convenient. Wide Compatibility: Bluetooth 5.0 receiver compatible with most smartphones, ideal for home audio systems or of vehicle. (Such as: computer, TV, projector (transmit mode)/speaker, earphone (receive mode).