Bluetooth Transmitter ReceiverWith the high-end integrated Qualcomm chip, the product has lossless sound quality, low delay and high compatibility. and achieves excellent audio and low latency with APTX HD and aptX-LL codecs, when watching movies , You can enjoy it without feeling the delay of voice. (NOTE: Attention: Do not use during charging.)ADVANCED Bluetooth 5.2 More Stable, More ReliableEngineered with the latest Bluetooth 5.2 technology featuring four times the range, two times the speed of older versions of Bluetooth, and it can deliver more stable wireless to your devices.Supported Audio Format FilesTX compatible codec: aptX / aptX LL / aptX HD / SBC RX compatible codec: aptX / aptX HD / SBC / AAC. Note: The transmitter and headphones used must meet the same standards. (Example: The sending device supports audio decoding "aptX LL/aptx HD", while the receiving headphone only supports audio decoding "aptx HD", so it cannot send aptX LL).Transmission Mode (TX)sound source for TVs that do not support Bluetooth connection. Easily make it wireless and let it flow with Bluetooth earphones.Receive Mode (RX)When you want to connect a wired earphone, speaker, etc. wirelessly, it becomes wireless instantly through the receiver mode, and you can enjoy music such as a smartphone equipped with Bluetooth wirelessly.(Bypass) ModeBypass connects an input directly through to the connected output, and will neither transmit nor receive.Dual-Link, Two Headphones TogetherDual-link function that allows two Bluetooth headphones/speakers to be connected at the same time, audio will play through both devices simultaneously. Enjoy a late-night watching TV film with a partner, at your own volumes, without awaking others in your household.