Specification: Product Name: TPA3116D2 digital amplifier board Product Type: XH-M543 Amplifier chip: TPA3116D2 Power supply voltage: DC 12-26V (24V recommended) Output power: 120W * 2 max Channel: two-channel Signal to noise ratio: 100db Size: 92 * 68 * 17mm Pre-board IC improving input sensitivity, high-definition sound quality Power supply DC 12V 50W * 2 Power supply DC 24V 120W * 2 Note: Red is positive, and Black is negative! Package Included: 1 x TPA3116D2 2*120W Dual-channel Amplifier Board