Features: With the latest high integrated chip, bluetooth-compatible 5.0, USB playback, digital signal conversion and analog, KTV all-in-one machine, the audio is transmitted to the ordinary speaker for playing, the ordinary speaker is upgraded and utilized, and a dongle can enjoy the convenience of various technologies. Adopts the highest version of bluetooth-compatible V5.0, providing the best transmission efficiency, stability and ultra-low power consumption. Converts coaxial or optical digital audio signal to analog L / R audio. With USB interface, it can directly for play the music in U disk, supporting MP3, WAV, wma, ape, FLAC, SBC and other audio formats. Remote control support: for play / pause, previous, next, sound effect adjustment. Microphone interface, optional with mukefeng for KTV, remote control supports music, for echo volume adjustment and sound effect switching. Specifications: Material:ABS Size:Approx.8.5x7.2x2.8cm/3.35x2.83x1.1in Net Weight:280g Package Includes: 1x DAC Decoder note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.