Features: 1. SAFER DRIVING: By recording the electronic sensors installed in the tires, real-time automatic monitoring of various conditions of the tires can provide effective safety guarantees for driving. 2. REAL-TIME MONITORING: Monitor the real-time temperature and pressure of 4 tires at the same time with high degree accuracy. 3. SOLAR CHARGING: The tire pressure monitoring system receiver itself has a solar panel and large capacity rechargeable battery. 4. Voice Reminder: It monitors temperature, pressure and power of sensors in real time, and gives voice alerts, making your road trip safer and more stable. 5. WIDELY USE: Suitable for car tire pressure range less than 3.5 Bar, like passenger cars, off-road vehicles, commercial vehicles, MPV, SUV, minivans, and trucks. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Power supply mode: solar / micro usb Product Size: 9.5 * 4.7 * 3.3cm Net weight: 103G monitor: Working frequency: 433.92MHz 50kHz Working voltage: 2.6-3.6V Work current: normal 4.0mA \ shutdown 100ua Working environment: Temperature -20C-70 C Storage temperature: -40 C-80 C sensor: Working frequency: 433.92MHz 15kHz Working voltage: 2.0-3.6V Work current: static 1ua \ instant emission 8mA Working environment: Temperature -30C-105 C Monitoring range: Pneumatic 0-8.0 bar Air pressure accuracy: air pressure 0.1 bar includes: 1 x Monitor 4 x External sensor 4 x Pad 1 x Tool 1 x Manual