STURDY & FULLY ENCLOSED SHUT OFF SWITCH: 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. This is the best choice in harsh ocean conditions. COMPATIBILITY & SAFETY: This Battery Kill Switch Used for DC 12 - 48V systems to 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. EASY TO OPERATE: On/Off 2 position, Suitable for various 12 V/24 V/48 V systems. Current voltage: rating at 300 A continuous (1 hour) at 48 V DC and 1000 A for 5 seconds. Clockwise to turn on , counter clockwise to turn off. WIDELY APPLICATION: Battery isolator 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. Design: Fully enclosed design to protect wiring from dirt, corrosion, and rain. 2 Positions: On/Off. Voltage: Used for DC 12 - 48V systems to isolate and secure the electrical system. Rating: 275 A continuous at DC 12V, 455 A Intermittent at DC 12V, 1250 A momentary at DC 12V. Colour:Black+red Material:ABS plastic + metal Size:2.6x2.6x2.9inches Terminal Diameter: 3/8 inch(10mm) Package Contents: 1 x Battery switch 4 x Mounting Bolts 4 x 2 x 3/8 Copper Ring Terminals 4 x Heat Shrink Tubings 1 x Hex wrench Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.