Features 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 types，fast 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 System Material: ABS and Metal Master: SY36201 Contact Name: BLE4.1 Communication Mode: Bluetooth 5.0 Operating Voltage: 2.1-3.3V Static Current :≤1μA Bluetooth Operating Frequency: 2.4ghz Bluetooth Transmit Power: 4dB Response Time :≤ 4S Display Mode: for APP type Waterproof Grade: IP67 Working Humidity: 95%Maximum Tire Pressure Monitoring Range: 0-100 psi Tire Pressure Monitoring Error: soil 3PSI Operating Temperature: -30- +70°C Storage Temperature: -30- +70°C Battery Life: 2-3 years Battery: 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 freely Application: Suitable for car, trailer, RV, motorcycle, electric car, ATV, etc Requires mobile phone support Bluetooth version 5.0 or above Package List 4 x Tire Pressure Monitoring Systems 4 x Nuts 1 x Wrench 1 x User Manual 1 x Sticker