SAFETY PROTECTION: This battery on off switch can isolate and secure the electrical system; eliminate any power draw from the battery when vehicle is not in use, disconnects the battery safely; provide a reliable way to shutdown electrical power during maintenance and protect batteries from excessive drain WATERPROOF & STURDY: The heavy duty cut off switch is made of ABS plastic housing and copper tin plating inner stud. Fully enclosed design to protect wiring from dirt, corrosion, and rain. PACKAGE INCLUDE: Equiped with 1* Battery Switch, 4 Pcs Mounting Bolts, 4 Pcs 2*3/8 Copper Ring Terminals, 4 Pcs Heat Shrink Tubings and a hex wrench, which can provide great convenience for your installation. WIDE APPLICATION: This master battery shut off switch is universal used for RV, Marine, Car, Boat, Camper, Travel Trailer, Truck, ATV, UTV battery and other engine application, makes it an effortless job of turning the battery on and off ROTATE BUTTON FOR EASY OPERATION: On/Off 2 position, Suitable for various 12V 24V 36V 48V systems. Rating: 275A DC Continuous (1hr), 455A DC Intermittent (5 min), 1250A DC Cranking (10 sec). Clockwise to turn on , counter clockwise to turn off