Siemens FirstSurge stops power surges from entering your electrical system protecting smart appliances, TVs, computers, heating and cooling systems and more. Every FirstSurge includes commercial class notifiers (LEDs, Audible Alarm, and Red Flashing LED) and supplemental GRM Diagnostics.PRODUCT FEATURES:- UL 1449 Listed, Type 2, Surge Protective Device (SPD)- Rated for 120/240 split phase panels up to 400A- Surge Current Capacities: 60,000 A - 3-stage commercial grade notification- Ground Reference Monitoring (GRM)- Installs onto any brand load center- Type 4 rated outdoor enclosure- 10-year product and connected equipment warranty