Transmitter + reciever: 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

Optical + 3.5mm: you get maximum flexibility with support for both 3.5mm (aux and RCA) and optical (Toslink) digital, both input and output are supported

Low delay: aptX low latency technology eliminate Bluetooth audio delay, so you can watch TV/ movie/ video and listen to high-clarity sound in perfect synchronization

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-pair with existing paired devices

Cable-free Roaming: keep your old stereo or wired headphone alive with new Bluetooth wireless connection, pair with smart phone or tablet from up to 30 feet away, and enjoy great music cable-free