【EASY TO INSTALL AND USE】Knob type, easy to operate, disconnect and reconnect the battery with a simple knob. Also Easy to install, install to the negative electrode of the battery. Make sure the negative battery post and battery clamp (original battery connector) clean before installation. 【EXTEND BATTER'S LIFE】Car motorcycle disconnect battery cut off Kill terminal anti-leakage switch, used for battery to isolate and secure the electrical system, help to eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely. 【HIGH QUALITY MATERIAL】Battery quick disconnect switch is made of zinc alloy with brass plating, good conductivity, stable performance and long service life. This battery master switch isolator Widely used for car, boat, truck, RV vehicles and electrical equipment. 【MULTI PURPOSE】If you store the vehicle for a long time, this battery master disconnect switch effectively solve the leakage and power loss, also you can take the knob off as an anti-theft device to prevent vehicle theft. Much easier than taking the battery cable off each time. 【DEVOTED CUSTOMER SERVICE】We have 100% confidence in our product. If you have any question about this battery master isolator switch, we will happily accommodate and work with you. All issues will be solved within 24 hours. Your satisfaction is our highest priority !