SMAKN&reg; TDA7492 2x50W D Class Digital Amplifier Board AMP Board With Radiator With 4 model GAIN parts, can auto work on different voltage The use of high-speed SMT placement machine, over temperature reflow, the performance is very stable Comes with super output short-circuit and over-temperature overload and prevent the impact of the switch machine. Power supply: Single-voltage 10-26V DC. Maximum power: 2x50W / 8 Ohms ;Mono BTL power: 100W / 4 Ohms . Size: 70 x 57 x 21mm . Package included: 1 x Amplifier Board AMP Board with Radiator.