Product name: Mono 100W Bluetooth audio amplifier board module<br> Model: -1001B<br> Power amplifier chip: TPA3116D2<br> Bluetooth version: 5.1<br> Bluetooth transmission distance: 15 meters<br> Audio input: Bluetooth+AUX+USB stick+USB sound card<br> Audio output: mono 100W<br> Adapted power supply: DC7-24V, 4A (AC is not allowed)<br> Adapted horn: 20-100W, 3-8 Ω<br> Volume adjustment: total volume with button, click: play/pause; Double click: next song; Three strikes: enter or exit mode; Long : turn off/on<br> Protection mechanism: input anti-reverse connection, over-temperature, over-current, short circuit, anti-static protection<br> Features: support Wuzhi audio app. Modify the Bluetooth name, password settings, prompt tone volume adjustment, on/off prompt tone, sleep aid, firmware upgrade, and so on. matching function and the true wireless function make the two sets of speakers can be combined to form a left and right channel box matching, with a stronger sense of spatial positioning.<br> Product size: 89 x 45 x 20mm<br> color:Black<br> Material:PCB+metal<br> Package Contents:<br> 1 x amplifier board<br> 1 x DC adapter<br> 1 x screwdriver<br> Only the above package content, other products are not included.<br> 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.