Sturdy Construction- Compact size, sleek modern appearance,housing to resist the harsh marine conditions, made for safety use, rear cover insulates terminals against any short of circuits, equiped with 4 sets of bolts. Simple Operation- On/Off 2 position, 275 A continuous at DC 12V, 455 A Intermittent at DC 12V, 1250 A momentary at DC 12V,for 10-12MM screw connection. Great Compatibility- used for DC 12 - 48V systems to isolate and secure the electrical system, can stand alone or be locked together with other switch, simple and economical way to separate batteries. Safety Protection- Marine battery disconnect switch can disconnects the battery safely, to any power draw from the battery when vehicle or boat is not in use. Wide Application-battery isolator switch is very easy to install, universal used not only for Car, Van, Caravan, RV, Truck, Marine Boat, but also electrical equipment's switch, such as flashing light, chassis light, fog light, dome light. battery switch, battery power master switch disconnect isolator for Car, Vehicle, RV and Boat made for safety use. Rear cover insulates terminals against any short of circuits. On/Off 2 position. Copper terminal studs with nuts and washers. 4 mounting screw holes. Can stand alone or be locked together with other switch. any power draw from the battery when vehicle or boat is not in use. Disconnects the battery safely. Universal used for Car, Vehicle, RV and Boat. Used as lectrical equipmentis switch. colour: Black + red Material: ABS size: 2.68 x 2.68 x 3.07 inch mounting screw holes diameter: 10mm Package Contents: 3 x Battery switch 12 x Mounting bolts Only the above package content, other products are not included. Note: Light reflection 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.