Product name: 2.1 channel Bluetooth audio power amplifier board     Model: S100H     Using chip: TPA3116D2     Audio channel: 2.1 channel     Bluetooth version: 5.0          Power supply: above DC5-26V/10A     Audio input: Bluetooth+AUX+U disk+USB sound card     Audio output: left and right channel + subwoofer + 3.5mm interface stereo output     Output power: 50W*2+100W     Left and right channel adapter speakers: 10W-100W/4Ω-8Ω     Subwoofer adapter speaker: 20W-200W/4Ω-8Ω     Product size: 113mm x 95mm x 25mm     Weight: 189g     Function: Support APP control     Material: Plastic + Metal + Electronic Accessories     colour: black          Package Contents:     1 x power amplifier board bare board     1 x top cover     1 x lower cover     6 x Knob Caps     1 x Heatsink     1 x Thermal Silicone Pad     8 x copper posts     8 x screws          Only the above package content, other products are not included.     Note: Light shooting 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.