Andoer Caline CP-20 Overdrive Guitar Effect Pedal ?Crazy Cacti ? Aluminum Alloy Housing Ture Bypass True bypass design, minimizes tone loss and get more control of your pedal. Aluminium alloy housing, good durability. Simple design and a sturdy casing. Designed with on / off LED, instructs effects status. Powered by a 9V battery or 9V DC power adapter (neither included).