Neewer NW-332 Mini Electronic Guitar Looper Effects Pedal True Bypass Unlimited Overdubs 10 Minutes Recording Super mini size, made of aluminum alloy, convenient and durable. Record(up to 10min), overdub(ulimited), undo, redo and delete functions. Simple operation, one key to achieve almost all of functions. With one knob for adjusting the output volume. One LED light for showing the working status. Working Current: 96 mA. Requires a 9V power supply(NOT INCLUDED).