Exact Specifications: Our battery disconnect switch is available in two styles, On-off top post coming with two screws and washers. Both styles are for use on DC 12 - 48v systems. 275 A continuous at DC 12V, 455 A intermittent at DC 12V, and 1250 A momentary at DC 12V. Easy to Use: The installation is no difficult, without the need for extra battery cables or lugs. Connect it directly to the top battery negative terminal to easily isolate and protect the electrical system. It features a two-position switch design, turn the knob cover to change the working status, which is easy to operate. Compatibility: On-off side post has a battery disconnect switch that extends the top post negative terminal to a standard size for use with 17mm tapered negative batteries. On-off top post is compatible with side post batteries or other batteries with 3/8" post terminals. They are widely used in car, boat, RV, truck, ATV battery packs and other electronic equipment. Main Function: When the vehicle is not in use, without disconnecting the battery power will consume electricity until the battery is drained and the car will not start. While our battery disconnect switch can safely cut off the battery to prevent battery exhaustion, protect the electrical system so as to maintain your vehicle's performance. Premium Material: It's housing is made of flame-retardant plastic to prevent short circuits. It can effectively resist high temperature and fire, secure to use in high temperature conditions. The screws are made of brass iron, strong and wear-resistant, not easy to break and damage. Therefore, with it, you can have peace of mind and use it for a long time.