Draw-Tite Activator IV Electronic Brake Control for 1 to 4 Axle Trailers, Timed Actuated. Diagnostics for overload and open ground, short circuit protected. Output indicator and digital output indicator with front display that allows viewing at almost any angle. Up-front push buttons for Sync and Output. Mounts in any position, no leveling required, mounting hardware included. Integrated Plug and Play port for 2-plug adapters allows quick and easy connection. It adapts to all Cequent 2-plug vehicle specific brake control wiring harnesses. Limited Lifetime .