Features: Advanced smart delay brake controller ensures stable braking performances during emergencies with intelligent timing technology, perfect for trailer brake controllers and delay brake systems. Crafted from high strength plastic, this lightweight trailer accessory resists corrosions and withstands harsh conditions while remaining for 1-4 axles trailers. Ideal for long hauls truckers, diyer enthusiasts seeking reliabled brake control solution without professional installation. Enhances safety during stop and go traffics, mountainous terrains, or rainy highway drives by optimizing braking response time. Its tool less setup and universally design make upgrading your trailer's braking systems effortless, delivering peacing of mind across diverse towing applications. Specifications: Component: plastic Suitable for 1~4 axles trailers Size:Approx.7.01x11x2.11x6.5cm/2.76x4.33x0.83x2.56inch Color:Black Model:8507111 Adapted to a variety of trailer models High-efficiency delay control systems Usage scenarios: transportation and storage Practicality: Improves trailer braking safety and ensures smooth parking, suitable for long-distance transportation and traffics environments with frequent starts and stops. Package Includes: 1pcs Trailer Brake Delay Controller 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.