For 1, 2, 3 & 4 axle trailers. Distinct, easy to see LCD display with multiple color and contrast options. Allows the user to switch between electric and hydraulic brakes. Highly advanced, easy-to-understand, roadside diagnostics. Easy access, "up-front" controls. The original "boost" feature allows for different levels of customized braking. Unique, easy-to-use, clip-mounting system. Quick disconnect for easy storage; convenient storage pouch included. In addition to multiple color and contrast options, the LCD display features highly advanced, easy-to-understand roadside diagnostics. P3's convenient features include a dash-hugging design, unique easy-to-use clip-mounting system, quick disconnect for safe storage when not in use and the original "boost" feature that allows the driver to increase the initial power delivered to the trailer brakes. Press "Product Overview" for warranty information.