USB Solar Charging Motorcycle TPMS Motor Tire Pressure Tyre Temperature Monitoring Alarm System with 2 External Sensors Function:With the TPMS, we can keep the tire working within the specified pressure and temperature range at any time to reduce the damage of the tire for safe driving. Main features: - Powerful TPMS: TPMS can monitor tire pressure / temperature status in real time, which will transmit real-time voice alarm and warning indicator light to remind the driver for driving safety. - Wide compatibility:This system is widely compatible with those motorcycles with 2 tires. You don't have to worry about the compatibility issue. - Power supply:Supports USB charging, which means that you could use the USB cable (not included) to charge it up while it is in low power, rather convenient. - 2 external sensors:Its 2 external sensors with IP67 waterproof grade are suitable for being used on rainy days. Besides, they are in high sensitivity and good accuracy for measuring pressure and temperature. Specifications: - Battery: built-in 140mAh button cell - Waterproof grade: IP67 - Working temperature: -30 - 80 Deg.C - Storage temperature: -30 - 85 Deg.CTPMS: - Battery: built-in 345mAh Li-ion battery - Operating voltage: 3V - Working frequency: 2.4GHz - Response time: 6s - Working humidity: 95 percent and less - Pressure monitoring range: 100 - 900 kPa - Pressure accuracy: minus or plus 10 kPa