Tire Pressure Monitoring System TPMS, Solar Power Universal Wireless Car Alarm System with 4 External Sensors, LCD Real-time Display 4 Tires' Pressure & Temperature Alerts Ensure Safe Driving

Over the years I've had to replace many tyres with uneven wear caused by my neglect of inflation pressure. I saw this sort of thing built in on a brand new car and thought thats what I need. Its simple to use.. Charge on the usb, just once, and the little solar panel then tops up. Add the sensors to the values. Press a few button, as per instructions. Job done. However, after about 3 months, I did have one sensor go faulty, but after 2 or 3 short messages to VAOYAO, they sent me a new replacement unit that arrived in a couple of days. So good product and good supplier.

If you take a close look you will find a number of TPMSs for sale. On close examination it appears that hardware wise they are all identical and are probably made by one manufacturer. The firmware, the software that defines how they opearate and what the user interface and menus look like seems to be a completely different matter. Each vendor appears to have their own version, some are OK and some are awful. I wasn't impressed with the user interface for the VAOYAO device but its main problem was that none of the four pressure sensors would pair with the display unit. I thought at first that perhaps the sensors had been mislabled (The are marked FL, FR etc for front left and front right) and that I was inadvertantly trying to pair a sensor that I was not actually fitting to the tyre valve, after careful checking it turned out that that wasn't the case. Before I returned the device to Amazon for a refund I did email VAOYAO hoping for some advice about pairing (I have had a couple of similar units in the past that lasted for several years each. I got a reply from China but they didn't seem to have much idea about what might be going on.

Bought this as I destroyed a tyre by driving on it when it was low on pressure. Very easy to installed and charged battery only once ( Solar charge keeps it toped up ) . Great for reassurance that everything is as it should be with tyres.

It's a great addition to monitor your car tyresOnly reason I can't give it 5 stars is following:- Don't use security nuts, it's close to impossible to remove them after some time, spent whole evening cutting them off- When it's extremely sunny outside the display for some reason becomes invisible or the device itself shuts off, can't figure out why...maybe overheating issues

It won't read the tyre sensors because the 3v batteries inside the sensors are dead.They should not be pre installed in the sensors.Update this review. The tyre pressure monitoring system is working now I replaced the four batteries.To the seller, please measure the batteries voltage to ensure you're selling a working product.

Support sent me 4 of these due to them not working, in the end, I used a volt meter and found that all the batteries were flat, I bought some more new batteries and they all started working.

But as mentioned by others, the batteries in the sensors for the valve stems arrived flat and had to be replaced with new ones! Otherwise, so far so good.

good little gadget, easy to use and clear display. solar/USB chargingkeeps track of air in tyres