The main parameters:

Product name: 2.1 channels of audio amplifier board

Specifications: M139

Chip selection: TPA311602 * 2

Power supply voltage: DC12-24 v output power: 50 wx2 heavy bass x1 + 100 w

Output load: 4 to 8

Frequency response range: 14-100 KHZ

Signal to noise ratio: 100 db

Number of channels: 3 (left track + right track + heavy bass)

Switching frequency: 1.2 MHz

Appearance size: 100 * 70 * 30 mm