Description:  1. 2-in-1 Transmitter and Receiver Mode With updated Bluetooth 5.1 technology, transmit data twice as fast as Bluetooth 4.2, more stable connection never short.  ① In TX mode connect the Bluetooth transmitter to audio output devices, have your TV, computer, iPod transmit audio to your Bluetooth speaker, headphones.  ② In RX mode transmit audio from your phone to a non-Bluetooth device (home stereo system , speakers). Turn your old home stereo into a smart speaker in seconds.  2. Unique user-friendly and visible OLED screen design Adopting the latest visible OLED screen design, the ELEGIANT BTI-077 Bluetooth home stereo adapter can bring you a different operating experience. You can clearly see the connection status and paired devices, battery, volume. Very easy to use, goodbye to blind connection.  3. Pair one with two + no lip sync delay This Bluetooth TV transmitter receiver can connect 2 Bluetooth headphones simultaneously to your TV in transmitter mode, or pair 2 devices to your home stereo system to transmit music in receiver mode to it weather. Automatically connects to your previously paired devices upon power-up. Supports HD low latency to virtually eliminate Bluetooth audio lag. Note: In low latency mode, Bluetooth low latency headphones and speakers are also required.  4. 15 adjustable volume levels and 20+ h long battery life h Bluetooth Audio Transmitter Receiver can adjust the volume from L1-L15. 3 hours of full charge, more than 20 hours of use time. Equipped with 3.5mm AUX audio cable and RCA audio cable.    Package Included:  1 X Bluetooth 2-in-1 Adapter;  1 X RCA Audio Cable;  1 X 3.5mm Audio Cable;  1 X Packing Box;  1 X User Manual;  1 X Trouble Shooting Guide;  1 X Usb Charging Cable