aoeyoo AY63 Bluetooth Music Transmitter And Receiver Adapter 4.0 with aptX codec and Digital Optical Output (Toslink or Coaxial) for Bluetooth Audio Streaming This product can memory 10 groups device which paired with it already, and automatically paired when next time you use. This product uses optical fiber, coaxial line and 3.5mm audio output ensure the super sound quality and easy to connect with all devices. Supports both SBC and aptX for the highest quality audio coding. Transmission distance up to 10m(Note: the actual use of Samsung mobile phone it can up to 20m). Works With All Stereos & Docks!! Use the Digital Output and get the highest sound quality you deserve. For Sony, Phillips, Arcam, Yamaha, Pure, Roberts, Bowers & Wilkins, Intempo, Ruark, Gear 4, JBL, Bowers and Wikins and many more.