Overview:  Why we need this device?  Sometime we have to stop the engine for long times(15 days or more),Car battery run off day by day. What if it is out of battery one day?  You can't start the car. This device can cut the power off , You just need to turn on the battery with your remote when you want to use the car one day.     Parameters:  Max Current: 1000A;  Rated Current: 180A;  Rated Voltage: DC 12V/24V;  Working Voltage: DC 10-15V/DC 20-29V;  Lifetime of Use: 100,000 Times;  Remote Receiver Standby Current: 0.0085A;  Main Switch Size: Height:3.2", Width:3.8", Length:5.8";  12V for car, 24V for truck;  This switch support manual control. If your remote lost or out of power, you can press the button , then battery connect.    Notice :  1. This device is only for battery on / off, it can't start your engine.  2. Pls do not cut the power off when your engine is working.  3. The remote has been paired well with the switch before shipping, you can use it directly when you get it .No need to pair them again.    Package Included:  1 x Electromagnetic Car Battery Switch with wiring cable,  1 x Remote Control,  1 x Remote Receiver Relay with wiring cable,  1 x English Manual