Thank you for purchasing the CXU-22. The CXU-22 is a Bluetooth capable audio receiver that connects non-Bluetooth speakers to your smart phone, tablet or PC. The CXU-22 supports the lasts Bluetooth low energy 5.0 version and APTX technology for delivering CD quality audio through your speakers or headphones. Analog stereo L/R RCA as well as S/PDIF TOLIN and coaxial outputs are included for superior music quality. The CXU-22 is powered by 5V through the supplied micro USB power adapter. Read all safety and operating instructions before using the Bluetooth receiver.