HEAVY DUTY & FULLY ENCLOSED KILL SWITCH: The heavy duty kill switch is made of ABS plastic housing and tinned copper inner stud. Fully enclosed to protect wiring from dirt, corrosion and rain. Best choice in harsh ocean conditions. COMPATIBILITY & SAFETY: Battery kill switch used for DC 12 - 48V systems to isolate and secure the electrical system; Eliminate all power draw from the battery when the vehicle is not in use, safely disconnects the battery; Provide a reliable way to cut off power during maintenance and protect batteries from over-discharge. EASY TO USE: 2 on/off position, suitable for various 12V/24V/48V systems. Current Voltage: Rated at 300A continuous (1 hour) at 48V DC and 1000A for 5 seconds. Clockwise to turn on, counterclockwise to turn off. WIDE APPLICATION: The battery isolator switch is universal for RV, boat, car, marine, camper, caravan, truck, UTV battery and other engine applications, which makes it an effortless job to turn the battery on and off. : Fully