This Amplifier Board is high power as 2 x 160W and DC 15-36V wide voltage input range. The board will turn on cooling fan to cool itself down once heat sink reaches to certain temperature and reverse polarity protection, safe to use. Two channel stereo output for good sound quality. Feature - ColorAssorted Color - Material: plastic and electronic components - Size: 12 x 2cm - Amplifier Chip: TDA7498E - Working Voltage: DC 15-36V(Recommend 32V, 8A) - Output Power: 2 x 160W - Number of Channels: Two-channel Stereo - Efficiency: 85% - Applicable Speaker Impedance: 4/6/8ohm(8ohm is the best) - Wide range DC 15-36V voltage input, safe to use with reverse polarity protection. - The cooling will turn on once heat sink reaches to certain temperature. - Support BTM mode, it can reach to 220W with 36V 3ohm for single channel Package list: 1 x Amplifier Board