About TPMS Introduction of the key: Right Select Key: Select key of menu M Menu Key: Long press into menu setting Left Select Key: Long press to turn on/off, Select key of menu Features: Type: Intelligent Solar TPMS Car Tire Pressure Solar power charging, dont need to charge by connecting car cigarette lighter Colorful LCD Digital displaying, clear to show tire information Rear-time monitoring pressure & temperature of 4 tires Low air pressure/high temperature alarm High Temperature / Leakage / Low Battery Alarm Intelligent Shock Boot when car moving, dont need to turn on/off Wireless connect by sensors, easy install Two units (PSI / Bar) changeable, you can set the one you like. External Sensor: Easy to install, convenient to replace Dust-Proof / Water-Proof / Anti-theft Anti High Temperate and Cold IP67 Protection / Waterproof Working Temperature: -20-85 Battery Life: 2 Years, replaceable Package Included: 1 set Car Tyre Pressure Monitoring System About Handheld Tester: Features: 100% Brand new and high quality LCD screen display with backlit for easy reading Small portable design, easy to hold and operate Pressure units available: PSI, BAR, KPA, KGF/CM2 Accurate and quick measuring, reliable to use Manual power on/off and auto power off for power saving LED light at gauge nozzle, convenient to use even at night This Mini Tire Pressure Gauge with easy-to-read LCD screen, is used to monitor your tyre pressure, thereby extending tire life, increasing fuel efficiency and ensuring your safety.It is suitable for measuring tire air pressure of cars, motorcycles,etc. Specifications: Test range: 0-150PSI Accuracy: 1PSI Resolution: 0.5PSI Units: PSI, BAR, KPA, KGF/CM2 Power supply: 1*3V CR2032 button battery (Included) Product size: As the picture Material: ABS Package included: 1* Tyre pressure guage Do drop