FiiO W1 Wireless Audio Link Lossless Transmitter/Receiver System, White W1 system (includes W1T1 and W1R1) is the very first generation of wireless audio transmitters and receivers. Power Supply sold separately They succeeded by bypassing the inconvenience that traditional wired connection with speaker, giving you the capability to enjoy your music boundlessly and limitlessly An Important characteristic of the W1 is the abundant input ports on it. It can support various audio sources, including PC, TV, DVD Player and etc; supports optical and coaxial and USB audio decoding, as well as RCA analog signal input Lossless 2.4G High Quality Sound Experience: Ordinary wireless audio products use a compression the loses which would sacrifice the audio index undoubtedly. W1 adopts uncompressed lossless audio which result in a high quality output sound and lossless transmission Real-time audio key technology: Transmitting, low-latency (20ms) and high coexistence (automatically switch channel in case of interference). Audio error concealment and digital sound effect processing, etc