Isolates the batteries and eliminates battery drain when vehicle or vessel is stored overnight or longer periods. Black plastic construction will not corrode, stands up to roadsplash & salt sprayIngress protected to IP67/ IP69KDepth of only 3" (knob front to end of studs), to install in locations with limited space behind panelIgnition protected to SAE J1171 and ISO 8846 for installation in a battery boxStainless steel hardware and tin-plated copper contactSPST. Rating: 32V. Current Rating (Continuous) 300A