CARCHET TPMS Tire Pressure Monitoring Replacement Sensor External Replacement Sensor only for CARCHET branded tire pressure monitoring system (TPMS). You can use this sensor to replace original damaged sensor after long time usage. Used as back up sensor for CARCHET TPMS. Multiple Sensors Can Be Mounted at the same time without worrying they are interfered by each other. Each sensor is coded to monitor and is controlled by separate chips. Anti-theft screw design prevents it from being easily stolen. Sensor Monitors Temperature and Tire Pressure (0~99 PSI) Simultaneously. It dynamically detects motion, and will automatically shut down to save battery when the wheel stops running for 10 minutes. Once you drive the car to above 20km/h, the sensor will automatically wake up and update data. Easy to Replace, Easy to Mount. Applicable to all CARCHET branded TPMS with external sensors. The sensor is powered by one CR1632 battery. We are Here for You if you are not sure whether this sensor is suitable to your TPMS and vehicle. Note: this unit only includes one sensor without monitor.