2.1 channel audio amplifier board Left channel + right channel + subwoofer Made of high-quality materials, sturdy and Easy to use Parallel relationship power supply, choose one of the two to use Product name: 2.1 channel audio amplifier board Chip selection: TPA311602*2 Power supply voltage: DC12-24V Output power: 50Wx2+100W subwooferx1 Output load: 4-8 ohms Frequency response range: 14-100KHZ Signal-to-noise ratio: 100db Number of channels: 3 (left channel + right channel + subwoofer) Switching frequency: 1.2MHZ Colour:Red Material:PCB Package Contents: 1 x Digital Amplifier Board 1 Set x Accessories 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.