Features: The on-off disconnect switch is designed for use on a single 12-48v battery. It can prevent unknown devices from draining the battery and save you from having to recharge it on a regular basis. Heavy-duty: solid manufacturing, rust-proof, corrosion-resistant, durable and safe to use. Purpose: Used for battery isolation and fixing the power system, when not in use on the vehicle or ship, eliminate any power on the battery and safely disconnect the battery. Used for general-purpose jambs batteries or other batteries jambs terminals, and also used in electrical equipment. Fitment: The battery disconnect can be used on auto vehicles, boats RV ATV motor homes, jet skis, motorcycles, race for cars and other tops post switch devices. Material: The switch is made of galvanized brass which is totally rust and corrosion resistant. The knob at the top is ABS material which gains a high strength and is damage proof. Specifications: Material:Plastic Size:About:6.8x6.8x7.4cm/2.67x2.67x2.91 inch Package Includes: 1x Battery Disconnect Switch note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.