Premium Quality, DurableMade of premium ABS and metal, the 12V-48V battery disconnect switch is sturdy, not aging and abrasion resistant, to ensure strength and durability. maximum durability for long lasting use. Waterproof and Protective ShellThis waterproof cut-off switch is designed with a waterproof cover on the top to better protect the key hole. Professional features, high reliability. Compact size, sleek modern appearance, easy to install and wire Safely disconnect batteryThis battery isolator switch can eliminate all power consumption from the battery when the vehicle or boat is not is not in use, safely disconnect the battery. 2 Position: On and Off Battery Disconnect Kill SwitchThey are offered as car main disconnect switches, rated from 75 amps intermittent, 50 amps continuous to max. 50 V DC; Crank Rating: 300 Amps 5 Seconds; contact resistance: 50m ohm max. Insulation Resistance: DC 500V 100m ohm min Wide Application & Quality GuaranteeThe waterproof battery isolator selector is perfect for cars, off-road vehicles, trucks, motorcycles , boats, etc. Professional features, high reliability, 100% tested before shipping to ensure perfect product, stability and durability.