Low delay: Low Latency technology Eliminate Bluetooth Audio delay, so you can watch TV/ movie/ video and listen to high-clarity sound in perfect synchronization. Note: Low Latency only supports TX mode. | Perfect Pairing: Featuring digital and 3.5mm/RCA audio interfaces. Support both input and output. Easy settings to enjoy wireless audio at home or on the go. Use the included digital optical fiber audio cable (SPDIF IN / OUT) to connect to a TV or home stereo receiver to provide multi-channel high-definition optical audio for the audio system. | Constant streaming and automatic re-pairing: internal battery provides up to 15 hours of using, support charging and streaming at the same time, and automatically re-pairs with existing paired devices. | Portable & Warranty service: The wireless audio transmitter and receiver are ideal wireless audio solutions for various situations and uses. It has advanced wired and wireless digital sound technology, which can transfer amazing sound from output to input device. 18-Month warranty promise. | Transmitter + Receiver: one portable adapter to use as either transmitter or receiver, powered by the latest Bluetooth 5. 0, can pair with two headphones/ speakers at once.