Features: Free Switching Between 2 Mode TX Transmitter / RX Receiver;  With TX, it can transfer the audio from your Bluetooth-inefficient TV to your Bluetooth devices, e.g. Transmit headphones; Conversely, with the RX it can be the audio from your Bluetooth device e.g. Transfer mobile phone on the Bluetooth-disabled stereos. Do you want to change the mode Do not worry, you do not need to turn off the power first, just push the side "TX RX" switch to the appropriate mode;  Easy On / Off and Quick Dual Connection;  To turn on and connect the unit, you only need to move the "ON ROCK" "TX RX" switch to the ON and corresponding mode. Then locate the Bluetooth signal "BT-B20" on your Bluetooth device and connect to it. If you want to connect the second device, double-press the side button "⇋" to connect quickly. It automatically connects to paired devices when it is turned on again;  Latest chipset CSR8675 brings HD;  Our 2 in 1 Bluetooth adapter has the latest chipset CSR8675, which means higher quality and shorter waiting time during transmission, ie.  HD (high definition) and LL (low latency) class. Just enjoy the 1A class sound quality without delay;  Bluetooth V5.0 allows 20M range and long battery life up to 24 hours;  Bluetooth V5.0 means low power consumption, faster transfer rate and further working distance, while most only offer devices with Bluetooth 4.2, 4.1. The maximum wireless distance is up to 20 meters (without obstacles). The 600mAh battery ensures a 24-hour continuous use. You can watch a dozen films at once without worrying about power failure;  Meet your various needs with 3.5mm AUX + Digital Optical + RCA Cable;  We offer 3.5mm AUX Audio Cable, Toslink Digital Optical Audio Cable and 3.5mm to 2 RCA Male Cable on. You do not need to get anything for the right connection cable, everything is there;     Package Included: 1 x ELEGIANT BT-B20 Bluetooth Adaptor;  1 x 3.5mm Audio Cable;  1 x USB Charging Cable;  1 x RCA Adaptor Cable;  1 x Optical Digital Cable;  1 x English User Manual