Product name: 2.1 channel Bluetooth audio amplifier boardProduct model: XY-E100HPower supply: above DC9-24V/5ABluetooth version: 5.1Audio channel: 2.1 channelsAudio input: Bluetooth+AUX+USB stick+USB sound cardAudio output: left and right channels+subwooferFrequency range: 20Hz -- 30KHzVolume adjustment: high-end encoder knob adjustment, feelOutput power: 50W * 2 (left and right channels)+100W (subwoofer)Satellite box (left and right channels) speaker: 10W-50W/4 - 8 Subwoofer (subwoofer) adapter speaker: 20W-100W/2 - 8 Protection mechanism: overvoltage, undervoltage, overheating, DC detection and short circuit protection function: support Sinilink-APP to the Bluetooth name, set the Bluetooth password, turn off/turn on the prompt toneProduct size: 82mm x 84mm x 24mmNote: The impedance of the adaptive horn is 4 ohms, and the power supply cannot 21V; The impedance of the adaptive horn is 8 ohms, and the power supply cannot 24Vcolor:BlackMaterial:PCB+metalPackage Contents:1 x E100H 2.1 channel power amplifier boardOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.