1、Transmitter: Turn your TV, set top box, TV box, DVD, etc. into Bluetooth enabled and transmit to any Bluetooth headset/speaker. (Support 1 drag 2, can be connected to two Bluetooth earphones at the same time). 2、Receiver: Bluetooth enabled wired speakers, speakers, home theater, etc. Can receive wireless from any Bluetooth device, can receive wireless audio from PC, mobile phone and other devices. 3、Low Latency: For headphones and speakers that do not support APTX‑LL, the BTC880 will work with an SBC or aptX codec with a delay of 70‑200 ms, but sensitive users may notice lip sync delays. 4、Note: To achieve Low Latency, your device must also support aptX Low Latency. It is not recommended to play live music while playing guitar, keyboard, electric drums, etc. 5、Not Recommended and Compatible for: The bypass or passthrough function is not supported. Volume control only works in AUX mode, not SPDIF (optical) mode. 6、Stable Performance: Our user friendly interface allows you to see clearly when the device is paired and provides direct volume control. Enables volume adjustment directly from the device rather than the actual TV or other source.