Haul Gauge is back! With Haul Gauge, you Know What You Tow. We give you the power to measure: Weight Tongue Weight Payload Pin Weight Weight Distribution Adjustments HaulGauge is a small device that plugs into your vehicle's OBD-2 port. By analyzing vehicle data and our device sensors, our app is able to measure real-time live weights relating to your vehicle and trailer. Try it today: https://www.haulgauge.com/ Trailer Brake Gain