Note: -This product requires downloading the app to use it. -If you purchase the model with U-disk , you can directly insert the U-disk to download the app. For Android player: APP compatible for Jansite Android DVD navigation. Plug and play, easy and convenient installation. Support English, Simplified Chinese and Traditional Chinese Alarm Monitor: TPMS simultaneously show 4 tires' pressure or temperature.TPMS automatic update the tire's pressure and temperature, keep your driving safe. Tire Pressure Monitoring system will be warning when the tire temperature is high, pressure is low. Slow and fast air leakage alarm when tire piercing Feature: The default factory settings for this product are: 1. High voltage alarm value:>3.1 Bar 2. Low voltage alarm value:<1.8 Bar 3. High temperature alarm value: 75C 4. Default air pressure unit: Bar Technical parameters of sensors 1. Workingvoltage: 2.1V~3.6V 2. Pressure measurement range: 0-8Bar 3. Temperature measurement range: -40 ℃ -125 ℃ 4. Sensor weight: external ≤ 10 grams, internal<; 34 grams 5. Waterproof standard: IPX67 6. RF operating frequency: 433.92MHz Receiver Technical Parameters: 1. Working voltage: DC12V 2. Maximum operating current: less than 15mA 3. High frequency operating frequency: 433.92MHz 4. Working temperature: -40 ℃ -85 ℃ 5. Communication line length: 20C. External Sensor: - Easy to install, convenient to replace -Dust-Proof / Water-Proof / Anti-theft -Anti High Temperate and Cold -IP67 Protection / Waterproof -Working Temperature: -20℃-85℃ -Battery Life: 2 Years, replaceable. Package includes: 1 set wireless Tire Pressure Gauge