MicroLite controllable breaker, single pole, 20 amp (refurbished unit).
This is a Westinghouse GHBS1020D relay breaker rated for 20amps, 120/277volt, is 1 pole, and is a motorized breaker.
This breaker has a 3 pin input so you can connect to a relay panel (mostly used in MicroLite Relay and Sports Lighting Panels).
Can be used as a regular breaker, but is typically used in relay panels.
This is a refurbished unit and is in good working condition.