Bluetooth 5.0 Everything is in place Bluetooth 5.0 technology lower power consumption compared to Bluetooth 4.2 Rejects bottom noise AC interference I the buzzing noise of flies Digital display Reduces damage and lasts longer Intuitive display of operating mode, playback time, broadcast frequency, etc. USB/TF card playback Use U disk /TF card, you can download the songs you want and DJ dance music playback, support a variety of audio formats TF card port No card holder required Copy MP3 audio files to a U-disk or TF memory card inserted into the correspondinginterface of the amplifier can , convenient and fast! Rated voltage: DC12V Rated power: 30WX2 Rated frequency: 20Hz-20KHz Distortion rate: 0.01% Impedance: 4-8Ω Power amplifier type: expansion amplifier Interface type: USB, TFCard Reception method: BT, FM Colour:Black Material:aluminum Package Contents: 1 x Host 1 x Remote control (built-in CR2025 battery) 1 x English manual Only the above package content, other products are not included. Note: Light reflection 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.