Features: High-efficiency solar panels, super battery life. 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 2 tires Low air pressure/high temperature alarm High Temperature / Leakage / Low Battery Alarm Intelligent Shock Boot when moto moving, dont need to turn on/off Wireless connect by sensors, easy install Two units (PSI / Bar/ /F) changeable, you can set the one you like. Introduction of the key: Long Press + "button to boot&shut down. Press and hold the Set "button for 3s to enter the menu select. After entering the menu setting,short press the + " button to set the menu selection . External Sensor: Easy to install, convenient to replace Dust-Proof / Water-Proof / Anti-theft Anti High Temperate and Cold Working Temperature: -20-80 Battery Life: 2 Years, replaceable Charging Voltage:DC 5V Pressure Range:0-3.5Bar Frequency :433.92MHz Transmit Power: Package Included: 1 set Moto Tyre Pressure Monitoring System Do drop