The 2 in 1 DIY TPMS monitors tire pressure and temperature in real time with visual and audio alarms. It has external, easy to install sensors that do not require tire balancing. The sensors are waterproof and dustproof and can monitor tire pressure between 20 to 50 PSI. The DIY car adapter has a powerful 180W output over 4 USB ports and 3 cigarette lighter ports. It displays the car battery voltage to prevent starting failures. It has over-power protection via a self-resetting fuse.