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Going down a slope with your trailer is dangerous without a proper brake system installed in your truck. Westin Brake Control W4 Series offers a reliable solution for getting the brake timing fast, allowing you to perform a stop in a split of a second with damage to your trailer or nearby traffic. The W4 Series works for 1-4 axle trailer types and hooks into the electrical system via a pigtail harness. It features an LED display and is a time-actuated brake controller. Getting down from a mountain is now easy and secure with this brake controller equipped. It also boasts an EZ tough thumb wheel that lets you adjust if you encounter sudden changes on the road. If something goes wrong, you can also rely on its manual override system to bail you out instantly. This system comes complete with mounting hardware for the driver side dashboard and is backed by a Limited Lifetime Warranty.