Features: 1.Function: Used for battery isolation and protection of electrical systems, eliminating any power drain from the battery when the vehicle or boat is not in use, safely disconnecting the battery. 2.Wide Application: Battery negative post only, widely used for Car, Vehicle, RV, ATV and Boat batteries, also used for electrical equipment. 3.Premium Material: The top post master switch is made of heavy duty solid brass, which is rust and wearproof, durable and safe to use. 4.Important Parameters: On/Off 2 gears, battery negative 15.5mm?17mm, DC 12V?24V system, 250A rated, intermittent rated 400A, DC 12V instantaneous 750A. 5.Easy Installation: Vertical blade type battery disconnect switch, switch the knife, then power will cut, easy to install and use. Specification: Item Type: Battery disconnect switch_x000D_ Material: Brass_x000D_ Rated Current: 250A_x000D_ Intermittent Rating: 400A_x000D_ Instantaneous Current: 750A_x000D_ Working Voltage: DC12-24V_x000D_ Installation Position: Battery negative pole_x000D_ Function: Prevent leakage, protect power supply, disconnect battery safely_x000D_ Applicable: Widely used for Car, Vehicle, RV, ATV and Boat batteries, also used for electrical equipment.