Feature:1. Operating System: The tire pressure monitoring system is designed for smartphones, simply connect your smartphone to the application "TPMSII". High speed connection, stable transmission, accurate data and long reception distance.2. 4 External Sensors: The system can dyamically monitors the tire pressure of all 4 wheels to prevent tire leakage damage and improve fuel efficiency. During driving, it displays tire pressure and tire temperature in real time, and issues an alarm when the statistics are abnormal.3. Easy Install: Scan the QR code on the card to download and install. Install the sensor to the corresponding tire according to the sensor markings, no need to remove the tire, it takes a few minutes to display the tire pressure and temperature after installation.4. Alarm Types: The tire pressure monitoring system offers 5 alarm typesfast and slow leak alarms, high pressure alarms, high temperature alarms and low battery alarms. User can set pressure, temperature and battery alarm values.5. TPMS Sensors: Bluetooth external TPMS sensor with low power consumption and long battery life of 2~3 years to extend tire life and improve driving safety.Specification:Item Type: TPMS Tire Pressure Monitoring SystemMaterial: ABS and MetalMaster: SY36201Contact Name: BLE4.1Communication Mode: Bluetooth 5.0Operating Voltage: 2.1-3.3VStatic Current :1ABluetooth Operating Frequency: 2.4ghzBluetooth Transmit Power: 4dBResponse Time : 4SDisplay Mode: for APP typeWaterproof Grade: IP67Working Humidity: 95%MaximumTire Pressure Monitoring Range: 0-100 psiTire Pressure Monitoring Error: soil 3PSIOperating Temperature: -30- +70CStorage Temperature: -30- +70CBattery Life: 2-3 yearsBattery: Button battery CR1632 140mAhx4 (external) (shipped with built in battery)The tire pressure monitor APP supports the display of four sensors, or the display of three sensors, or the display of two sensors, you can switch freelyApplication: Suitable for car, trailer, RV, motorcycle, electric car, ATV, etcRequires mobile phone support Bluetooth version 5.0 or above.Package List:4 xTire Pressure Monitoring Systems4 x Nuts1 x Wrench1 x User Manual1 x Sticker