DFRobot DFR0119-O Mini Audio Stereo Amplifier comes with left and right channels that can realize stereo surround sound and 2.54mm pin pitch. This 3W mini amplifier operates in two modes that is sleeping mode and working mode. The DFR0119-O amplifier stays in working mode by default even when the pin is disconnected. This mini audio stereo amplifier can be used in robot voice systems, DIY music boxes, and sound modification.