This module is ideally suited to adding a bit of amplification to your audio outputs. Connecting your audio inputs and a separate power 2 - 5.5V supply allows you to amplify an audio line in preparation to be connected up to a speaker. This module is ideal for situations where a device is unable to drive with sufficient volume or in instances where an audio signal has been split across multiple outputs, such as using a splitter. Onboard HXJ8002 single channel 3W, BTL bridge connected audio power amplifier chip.Operating voltage: 2.0-5.5V.Standby Current: 0.6uA (typ).The input signal frequency is 1kHz, 8Ohm load, the average output power under 1W maximum distortion is 0.5%.In THD + D Less than 10%, input 1KHZ frequency, different load conditions of output power (typical value): 3W (load 3Ohm); 2.5W (load 4Ohm); 1.5W (load 8Ohm).Model: HXJ8002.Size: 20*14*3mm(L*W*H).Weight: 1.1g.colour: Photo ColorMaterial: metalVCC: 2 - 5.5VGND: 0VL: Left channel inputGND: 0V InputR: Right channel inputV1: Speaker connectionV2: Speaker connectionPackage Contents:10pc * Audio amplifier module