BT transmission distance: 15mAudio input: BT+AUX+USB drive+USB sound card+MICAudio output: Left channel 220W+Right channel 220W+subwoofer 350WAdaptive power supply: DC15-36V, equal 8A (Do not connect to AC)Adaptive speaker: Left and right channels 50-200W, 3-8OHM; Subwoofer 50-300W, 2-8OHMModel: -DAM L1Name: 220W+220W+350W microphone audio integrated machineAmplifier chip: TPA3251D2BT version: 5.0Dual channel volume adjustment:1. Background music volume adjustment with multifunctional buttons (click pause, double-click next track, triple tap previous track, long press mode switch)2. MIC volume adjustmentProtection mechanism: Input anti reverse, over temperature, over current, short circuit, overload.Characteristic function: Dual microphone input, supports EQ adjustment on the upper computer, can be used independently as a 2.1 amplifier board, with multiple gameplay options.Product size:Amplifier board 122x110x27mm, karaoke board 100x44x14.7mmProduct weight:Net weight 331gType:B:With Karaoke BoardColour:BlackMaterial:Metal+PlasticPackage Contents:1 * Audio Amplifier ModuleOnly 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.