Features: 1.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. 2.2 external sensors with IP67 waterproof grade are suitable for being used on rainy days, and they are in high sensitivity and good accuracy for measuring pressure and temperature. 3.Supports USB charging, it means that you could use the USB cable (not included) to charge it up while it is in low power, very convenient for you. 4.TPMS is widely compatible with those motorcycles with 2 tires. You don't need to worry about the compatibility issue. 5.The tire pressure monitoring system is designed to provide you with more protection when driving. It will warn the tire condition in advance. Specification: Item Type: Tyre Pressure Monitoring System Material: PC+ Nylon Fiber/Copper Nozzle Host Technical Parameters (The Host is Shipped with Built-in Battery) Host Built-in Lithium Battery: Capacity 800mAh, 803035 Working Temperature -20-80 Storage Temperature: -30-85 Power-on Voltage: DC 5V Frequency: 433.92MHz20.00MHz Sensor Parameters (The Sensor is Shipped with Button Batteries) Built-in Button Battery: 60mAh Capacity, CR1632 Working Temperature: -20-80 Storage Temperature: -30-85 Pressure Range: 0-6.6Bar Accurate Pressure: +/-0.1Bar Accurate Temperature: +/-3 Transmitting Power: