Fangrui Product Details [sturdy And ] Remote Battery Disconnect Switch Made Of High Quality Material Shell And Pure Copper Wire, Better Contact, Long Service Life, More Than 5000 Times, Can Extend Car Battery Life By 2-3 Times. [more Convenient] The Wireless Remote Control Battery Disconnect Switch Allows You Not To Open The Hood Every Time To Turn On The Power, Just The Remote Control Button To Disconnect Your Car Power System, Saving You A Lot Of Time And Hassle, And The Remote Control Improves Safety. [easy Installation] No Modifications Needed! Step 1: Remove The Negative Power Line Of The Vehicle. : Fix The Negative Power Line To The Relay. Step 3: Fix The Relay To The Negative Pole Of The Battery. Step 4: Connect The Red Wire To The Positive Pole Of The Battery. 12v Battery Disconnect Switch Allows You Not To Open The Hood Every Time For Turn On The Power, Just The Remote Control Key Button To Disconnect Your Car Power System, Saving You Plenty Of Time. [better Security] Kill Switch Anti Theft, Any Power Draw From The Bat