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_x000D_ Material: PC+ Nylon Fiber/Copper Nozzle_x000D_ _x000D_ Host Technical Parameters (The Host is Shipped with Built-in Battery)_x000D_ Host Built-in Lithium Battery: Capacity 800mAh, 803035_x000D_ Working Temperature -20-80_x000D_ Storage Temperature: -30-85_x000D_ Power-on Voltage: DC 5V_x000D_ Frequency: 433.92MHz20.00MHz_x000D_ Sensor Parameters (The Sensor is Shipped with Button Batteries)_x000D_ Built-in Button Battery: 60mAh Capacity, CR1632_x000D_ Working Temperature: -20-80_x000D_ Storage Temperature: -30-85_x000D_ Pressure Range: 0-6.6Bar_x000D_ Accurate Pressure: +/-0.1Bar_x000D_ Accurate Temperature: +/-3_x000D_ Transmitting Power: