【Bluetooth Receiver and Transmitter】 2-in-1 Bluetooth offers TX/RX modes. With TX mode, it can transmit audio from your Bluetooth-incompatible TV to your Bluetooth devices, such as a transmitting headset. With RX mode, it can receive audio from your Bluetooth devices, such as transmitting from a phone to a stereo device that has Bluetooth turned off. If you want to change modes, you don't need to turn off the power. 【Bluetooth Hands-Free Calls】 In receiving mode, this product supports Bluetooth hands-free calls. When a call comes in, press the multi-function button to answer the call; During a call, press the multi-function button to hang up; When connected, double-click the multi-function button to redial after the call has ended. 【Wide Compatibility】 Bluetooth adapter with the included 3.5mm cables, this receiver transmitter adapter can be widely used on your computer, laptop, home stereo, headphones, smartphone, MP3 player, CD player, etc. 【Automatic Reconnection】 Just press the power switch, set it to the desired mode, you can quickly and easily establish a connection. An internal battery ensures that the Bluetooth adapter can be used for up to 8 hours and connects instantly to already paired devices. Bluetooth transmitter and receiver with wider compatibility, faster transmission speed, better audio quality.