Sturdy: Premium ABS plastic housing and metal terminal, durable for safe use, not easy to aging and abrasion resistant, to ensure maximum strength and durability for long-lasting usage. Purpose: Eliminate all power from the battery when the vehicle or boat is not in use, safely disconnect the battery. Avoid draining the battery. Operation: On-Off, 2 positions, 100 continuous amps at max. 32V DC; Cranking Rating: 500 amps 5 seconds; Contact Resistance: 50m ohm Max; Insulation Resistance: DC 500V, 100M ohm Min Compatible: Used for 12-32V DC systems to isolate and secure the electrical system, can be stand-alone or be interlocked with other switches. Widely used for cars, marine boats, RVs, caravans, trucks, ATVs, UTVs, battery banks and other devices. Switch Function: 3P SPST ON-OFF-OUT, Working Temperature: -30℃~+60℃, Contact Resistance: 50m ohm max.