Fulltone FPS-3 Noise Free 18 Volt Regulated Pedal Power Supply Regulated for steady, dependable performance Allows for quieter operation 2.1mm x 5mm end with negative center pin Compatible with most Fulltone pedals Voltage Range: 120V/60Hz, Output Amps: 200mA, Output Volts: 18 Volt, Sleeve/Tip Configuration: Tip:- Sleeve: +