The Mini Amp Kit is a LM386-based 1/2 watt mono amplifier that fits in an altoids-size tin. Features adjustable volume and gain control for unique voicing on the go. Use it as a traveling pocket amp, headphone booster, or as a preamp to add clean boost or a bit of crunch. Includes all parts shown, altoids-style tin and choice of 1/4″ instrument out or 1/8″ headphone jack. The input jack can be wired as a mono power switch (turns on when a mono lead is plugged in) or as a stereo in to mono out.