BetterWeigh wirelessly links to your smartphone to display real-time vehicle and trailer weights. It easily plugs into any standard vehicle diagnostic port (OBD-II) under the steering wheel and uses Bluetooth to connect to your Apple or Android phone. It then sends a live readout of all weights related to towing and hauling, including the gross weight of your vehicle and trailer, cargo, payload, tongue weight, pin weight, and weight distribution. This streamlines the towing setup process for any vehicle-trailer combination and promotes maximum safety on the road. The compact, portable design also allows for easy transfer from one vehicle to another.• Measures real-time vehicle-trailer weights for safer, easier towing and hauling• Bluetooth connection provides active readouts on the driver's smartphone• No-install, plug-and-play setup into vehicle diagnostic port (OBD-II) below the dash• Weighs vehicle, trailer, cargo, tongue, and pin weight and weight distribution• Accurate within + / - 5%• Offers easy brake controller setup by measuring exact trailer brake gain needed• Wireless, compact, portable design• Downloadable app available for Apple iOS and Android OS• Limited lifetime warrantyNotes:• Functionality on manual transmission vehicles limited to payload, tongue weight, pin weight, and weight distribution• Vehicles with auto-leveling suspension will have limited functionality• Not intended for weight certification Uses Bluetooth to connect to Apple or Android phone Reads vehicle, trailer, cargo, tongue, & pin weight & weight distribution Streamlines brake controller setup | Curt BetterWeigh Mobile Towing Scale with TowSense Technology in Blue