Available in from 30A - 300A Works with 12V-48V DC Systems Perfect for car audio/video system, boat, trucks, buses, RV's, ATV winches, marine and DC sound amplifier system Manual Reset, just press on the button and the circuit will close/open Protect from being damaged by over-load current or voltage Screw terminals hold cables securely in place Made of alloy materials, high-tech waterproof housing with 1/4" Stainless steel studs