"This super small stereo amplifier is surprisingly powerful.
It can deliver up to 3.7 watts for speakers with an impedance of 3-8 ohms.
exceeds the EMI limit unfiltered with up to 30 cm of speaker cablesupply voltage: 2.7 - 5.5 Vselectable amplification via 5 pinsDimensions: 28 x 24 x 3 mm"