Ride-On L.E.D. Pressure Alarm
Easy to install Valve caps simply screw onto the tire valve Self-adjusting Memorizes automatically the pressure every time it's fitted on tire Light and robust using a patented sensor Automatically compensates for tire and temperature eliminating false alarms All components conform to RoHS requirements Reliable warning flashes red when pressure drops by 4 PSI +/- 10% Anti-theft protection included and low battery alarm Sold as a pairs
Ride-On L.E.D. Pressure Alarm Review
For 39.99, it is very cheap product. If i'll need another household sensors & alarms, i'll definitely buy this again!