The Tire Linc by Lippert is the easy-to-install, always-on tire pressure and temperature monitoring system that makes sure you're always ready for the road. Integrated with Lippert's OneControl® app, you can monitor your 5th wheel RV, travel trailer, motorhome or towed vehicle's tire pressure and temperature right from your smartphone - don't mess with additional dashboard interfaces again. Monitors and alerts drivers of high or low tire pressure and temperatureKit includes: repeater assembly, four stem sensors, sensor tool, lock nut wrench, lock nut and o-ring kit (4), dock assembly, instruction manual and quick start guideCan monitor up to 20 tires sensors simultaneouslySensors come with CR1632 batteries (replaceable)