2-in-1 Bluetooth Transceiver: Upgrade Bluetooth on your TV, PC/Laptop or other devices and stream wirelessly on your headphonesThanks to our unique 2-in-1 design, you can also use the T13 as a receiver, use the non-Bluetooth car AUX system to receive your mobile phone's wireless music or have incredible hands-free calls.Suitable for TV: It is mainly used for watching TV, the TV sound is transmitted to Bluetooth headphones, then only you can Hear the TV sound (others can't hear it) so other people won't be disturbed. Car-compatible: In receiver mode, the Bluetooth adapter can help transmit music from cellphones to car speakers or home stereo systems without Bluetooth capability. Built-in microphone enables hands-free calling.Very easy to use, just pair and play. Easily switch between transmit mode (TX) or receive mode (RX) with just one wireless switch.Bluetooth V5.0: Bluetooth 5.0 technology can boost the performance of Bluetooth audio. Bluetooth 5.0 more stable audio transmission, less sound delay and better interference rejection.Compact Design: Small and lightweight features allow you to connect various devices anywhere, which also easily slips into your backpack, bag or laptop bag can be plugged in.