A simple and reliable stereo amplifier 2X2 Watts, suitable for any walkman or any other sound source where we need an amplifier even by using the level signal of the headphones output. It’s size is very small in order to be ideal for portable application. Supply voltage 6-9VDC, max current dissipation 400mA, output power 2X2 W/4Ù frequency response 20Hz-20KHz, typical distortion 0.2%