The shell uses premium material, more solid, high temperature resistant. Easy installation. The positive and negative poles can be connected at will. Made from high-quality materials to maximize performance and ensure lasting durability. This switch relay is suitable for construction machinery vehicles. Supports 8.5W coil power, 12V contact switching voltage, and 300A rated current. Specification: Item Type: Switch Relay Contact Switching Voltage: 12V Rated Current: 300A Scope of Application: Suitable for Construction Machinery Vehicles Coil Power: 8.5W Mechanical Lifespan: 300,000 Times Electrical Lifespan: 50,000 Times Main Contact Type: A Set of Normally Open Contacts Colour: Silver Material: Metal Package Contents: 1 x Switch Relay Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.