The power cut off switch can be used for cars, boats, electrical products with 12V 24V systems to isolate and secure the electrical system. Premium Material:The switch is made of copper and zinc alloy, aluminum, which makes it has isolation function and for use in harsh environments. Application:The battery kill switch is a great tool to shutdown electrical power during maintenance and protect batteries from excessive drain. Function: Battery power cut switch is designed for eliminating any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely. Name: Power Cut Off Switch Applies to: For Land or Tuned Vehicles. For 12v 24V automotive electronics, electrical products and marine products Colour:Black Material:Metals Package Contents: 1x Power Cut Off Switch 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.