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 Battery: built-in CR1632 button cell Working voltage: 2.0 - 3.6V Working environment: -30 ~105 Deg.C Pressure test range: 0-116 Psi / 0-8.0 Bar Pressure accuracy: plus or minus 0.1bar Waterproof grade: IP67 Transmission frequency: 433.92MHz Monitor : Battery type: 280mAh Li-ion battery Working voltage: 2.6-3.6V Working environment: -20 ~70 Deg.C Transmission frequency: 433.92MHz Pressure unit: psi / bar Temperature unit: Deg.C / Deg.F Package Included: 1 set Car Tyre Pressure Monitoring System Car TPMS Tyre Pressure Monitoring System Solar Power (type A and B) Features: 100% new and high quality. Solar or USB charging,much convenient and practical. Colorful LCD digital displaying, clear to show tire information. Wireless connect by external sensors, easy install. Built-in vibration sensor, the car automatically turns on when starting, and automatically turns off when the car stops. Note:The host must be turned on before installing the sensor. Press and hold the left button for 3 seconds. For the first time, it is recommended to charge with USB for 1 hour. Function: Rear-time monitoring pressure & temperature of 4 tires Low air pressure / High tire pressure alarm High temperature / Leakage / Low Battery Alarm Specifications: Display Material: ABS + Metal Working Temperature: -20 -- +70 Working Frequency: 433.92MHZ 20MHZ Voltage: 3.7V Current: Working 15mA, Standby 50uA Sensors Material: ABS + Metal Working Temperature: -20 -- +85 Working Frequency: 433.92MHZ 20MHZ Voltage: 2.0-3.6V Current: Static 1uA, Dynamic 15mA Tire monitoring Range: Pressure 0-3.5bar Accuracy:0.1bar Battery Life: 1-2 years Package included: 1 set xCar Tyre Pressure Monitoring System Car Tire Manometer Barometers Tester Tool with Electronic Digital LCD Tyre Air Pressure Gauge Meter For Auto Car Motorcycle 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 / 0-10.0 Bar 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 Do drop