Specification: Amplifier Chip: TPA3110 Working voltage: 8~26V DC (Power input with polarity protection) Recommended power supply: 12V DC current 2A Output Power: 2x15W Recommended speaker impedance: 4~10 ohms With mute interface: MUTE (Generally do not use) Specifications: 30mm*39mm Package Included: 1 x TPA3110D2 Digital Power Amplifier Module