Features: Engineered with a rapid response electromagnetic brake controller, this trailer emergency brake switches activates in under 0.1 seconds to prevent accidents during sudden stops or trailer detachment. Crafted from industrial grade heat resistant plastic and reinforced metal alloy, its durability outperforms standard plastic switches by 200% in harsh environments and prolonged use. Ideal for camping enthusiasts, and frequent movers requiring reliable braking solution for trailers, caravans, or heavy duty hauling equipment. Safeguards your vehicle on highways, rural roads, or steep terrains, this safety system ensures fast braking during emergencies like trailer swaying or abrupt deceleration. For most electromagnetic brake systems, its plugs and play design simplifies DIYer installation in 30 minutes without special tools, offering peace of mind for journeys. Specifications: Product name: Trailer electromagnetic brake protectors safety brake electric brake controller emergency brake switches Size:Approx.110.6x21.7mm/4.35x0.85inch Package Includes: 1pcs Emergency Brake Safety Switches note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.