Power your guitar effects pedal with this 9V Power Supply for Guitar Pedals from Monoprice! This AC adapter is intended for use with the Monoprice guitar effects pedals ; as well as guitar effects pedals from other manufacturers. It boasts a cable length of 9.8 feet (3 meters); which means you don t need to have an unsightly power strip next to your pedal board. It has the following physical and electrical characteristics: Tip negative Input power of 100~240 VAC; 50/60 Hz; 0.2A Output power of 9 VDC; 500mA DC connector barrel/pin diameter is 5.5mm/2.1mm