Features: This product can be exceptions to the tire preure monitoring, reminders, but cannot prevent the occurrence of puncture accidents. When preure and temperature of tires sppear abnormal, the system can emit sound and light alarm, the user does not need to observe the system's display, so as not to affect the vehicle's driving The date of tire send to Android DVD through USB port. You can contact supplier when you want to update the APP on your DVD. 6 Protections for Safe Driving: High Preure Alarm Low Preure Alarm Air Leakage Alarm High Temperature Alarm Battery Low Power Alarm Sensors Disconnection Alarm Specification: TPMS: Working Voltage: DC5V Working current: Working frequency:433.92MHz Working temperature: -40C--85C Communication line length: 200 mm Fixad for:3M tape Internal Sensor: Working voltage: 2. 1V-3. 5V Working frequency: 433. 92MHz Preure measurement range: 0-116Psi Temperature measurement range:-40C-125C Working temperature:-40C-125C External Sensor: Workingvoltage:2.1V-3.5V Workingfrequency:433.92MHZ Preuremeasurementrange:0-116Psi Temperaturemeasurementrange:-30C-85C Workingtemperature-30C-60C Package Included: External Product List: 1 Pcs TMPS Receiver 4 Pcs External Sensor 4 Pcs Nuts 2 Pcs Tape 1 Pcs Spanner Internal Product List: 1 Pcs TMPS Receiver 4 Pcs InternalSensor 2 Pcs Tape 4 Pcs Warning Post