Hot Selling Smart Car TPMS Tire Pressure Monitoring System Solar Energy TPMS Digital LCD Display Auto Security Alarm Systems Remind our external sensor can change battery , but internal sensor can"'"t change battery Main Features: -Solar power charging, LCD color displaying, automticbrightness adjustment -Rear-time monitoring the pressure & temperature -Low air pressure/high temperature warning -Set up sensor: learn new sensor ID code when replace sensor Sensor Specification: Operating frequency: 433.92Mhz Working temperature: -40 -120 Humidity: 0% to 100% Battery life: External sensor Working pressure: 0 75Psi Alarm pressure: Pressure accuracy: 1.5Psi Working voltage: 2.1-3.6V Waterproof: Ip67 Monitor Specification: Solar power charging LCD displaying Adhere to windscreen for installation Operating frequency: 433.92Mhz 50KHz Operating voltage: 3.7-5 V Working temperature: -20 -75 User Guiders How to turn it on/off Long press the left key of the screen for 5 seconds to turn it on, and long press the left key or 5 seconds to turn it off when it is power on. Two way for charger Solar charging and charge by port on the display side No air pressure display/values are not correct steps 1 : after installing the sensors, if there is no air pressure display or the values are not correct, please check if the original air pressure value is normal. steps 2 : if the original air pressure value is normal ,please drive the car over 20km/h, then the TPMS can renew the value automatically, and show the car air pressure and temperature. Whether can change battery Internal sensor can"'"t change battery while external sensor can change battery Keystroke / Interface description 1Solar energy charging 2Fetal temperature value 3Left selection key 4Menu key 5Right selection key 6Tire pressure value 7Electric quantity display 8Unit of temperature 9Tyre position 10Barometric unit 11Solar panels 12USB charging port Key function description Package Contents : ( Two for Choose: A B ) Noted :Don"'"t include retail box,if you need please ! A : TPMS with External Sensor B : TPMS withInternal Sensor Detail images