Smart Management Module, Voltage Rating: 240V, Amperage Rating: 50A, Enclosure: NEMA 3R Weatherproof, Status Indicator: LED, Includes: Jumper, For Use With: 1-Phase 50/60 Hz Generators, Applications: Designed to Optimize the Performance of a Standby Generator, Standards/Approvals: Prop65 Warning: Cancer and Reproductive Harm @www.P65Warnings.ca.gov