Machine power: 200W MAX stereo 50W*2+subwoofer 100W Power supply: DC12-24V (outer diameter 5.5mm inner diameter 2.5mm voltage interface) Impedance: 4-8 ohm Product size: 103X38X122MM U disk/TF supports playback: MP3 (8~320kbps), WAV (16bit 44khz ~48khz) audio format U Disk/TF Card: Maximum support 32GB capacity Bluetooth 5.0: compatible with all kinds of mainstream smart phone audio connection playback Colour:Silver Material:Aluminum alloy Size:122x103x38mm Package Contents: 1x mini power amplifier(Without power supply) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.