1、Using original TPA3116x2, PCM5102 DAC decoding chip. 2、The power supply filter capacitor uses two 1000UF / 35V electrolytic capacitors to ensure a strong source of continuous power support. 3、The resistance is 1% precision chip resistor, which ensures a good signal-to-noise ratio of the whole machine. 4、PCB adopts 6mm thick double-sided board, 0 ounces copper thickness, and full tin-spraying process to ensure good passing performance of large and small currents. 5、Made with high-quality electronic components, the performance is stable and reliable.  1 x Dual-Core Digital Power Amplifier  1 x Antenna  Item Type: Fever Digital Power AmplifierWorking Method: Class DQuiescent Current: 50mAWork Efficiency: 90%Rated Output Power: 2 x 100WFrequency Response: 20Hz to 20KHzWorking Voltage: DC18V to DC24VMaximum Output Current: 4AMachine Size: Approx. 175 x 126 x 43mm / 6.9 x 5 x 1.7in (without antenna height)