Description:onboard HXJ8002 single channel 3W, BTL bridge connection audio power amplifier chip working voltage :2.0-5 .5 V Standby current: 0.6uA (typical value)the input signal is a frequency is 1kHz, 8 loads; average output power is 1W condition, the maximum distortion is 0.5% the THD + D <10%, while the frequency of the input is 1KHZ under different load conditions the output power (typical): 3W (load 3); 2.5W (load 4); 1.5W (load 8) board size: 19.8 (mm) x14.2 (mm)