Square D QO Single-Pole GFCI Breaker GFCI ground fault circuit interrupter single-pole breaker. Class A ground fault and branch circuit overcurrent protection. Ideal for protection of entire branch circuits where damp location shock hazards may exist, providing overload and short-circuit protection of electrical systems. Equipped with the exclusive Visi-Trip indicator. When breaker is tripped, the handle snaps to a midpoint position and a highly visible, red indicator easily identifies the tripped breaker. ANSI American National Standards Institute certified and UL Underwriter's Laboratories listed is rated for 120 volts and 10,000 AIR. Amperage 20A, Number of Poles 1-Pole, Interruption Type GFCI, Voltage 120V, Frame Size 1-Space, Breaker Size 3/4 In., Mount Type Plug-In, Wire Size #12-8 AWG Al, #14-8 AWG Cu, UL Listed Yes, Pkg Qty 1, Package Type Clamshell WARNING Cancer and Reproductive Harm- www.P65Warnings.ca.gov