Usage Tips:1. The switch can be operated normally by battery or as an auxiliary battery switch. 2. Small size, beautiful appearance, strong and durable. 3. Easy to install, there are a variety of installation methods to choose from. 4. Trucks, tractors and professional racing cars. Today, switches are used in many conventional motorhomes. 5. The product has a wide range of uses, and can be used as the on/off of various electrical equipment installed inside and outside the car (such as: strobe lights, chassis, fog lights, ceiling lights, instantaneous power failure, etc.). Product Name: Battery Isolator Rated current, voltage:12-24V, Contact resistance:50m Insulation resistance:100M Note: Installation guide not included, we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Photo Color Material:Plastic + Metal Package Contents: 1 x Car Power off Master Switches Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.