Features: Great Gift: Simple and Wireless installation, a perfect gift idea for family, relatives, or friends to guard them along the long-distance journey. Description: Chip: Infineon Material: ABS Charge upper limit voltage: DC 5V Working current: Less than 15mA Power supply: Solar or USB powered Battery capacity: 1000mAh Connecting method: Wireless Working frequency: 433.92MHz positive or negative 1.00MHZ Temp setting range: 60 Celsius~110 Celsius Tire pressure setting range: 0-4bar Working temp: -20 Celsius~80 Celsius Storage temp: -30 Celsius~85 Celsius Item size: 8 *7.3* 1.5cm/ 3.15* 2.87* 0.59in Parts List: 1 * Tire Pressure Monitor 4 * External Sensor 1 * Charging cable 1 * Spanner 4 * Anti Theft Bolt 1 * Double-sided Tape 1 * User Manual Multiple Alarm Modes:It supports multiple alarm modes such as slow tire leak, fast tire leak, high pressure, high temperature, sensor's low power, sensor's failure, and other alarms, real-time monitoring of tire conditions to ensure you a safe trip. Visible & Audible Alerts:It owns a large color display screen, showing tire pressure, current temp and date, more visually when driving. Besides, it also possesses a buzzer to remind you when you have to pay more attention to the road. Solar & USB Charging:Powered by solar when it's sunny to use one more USB port of car charger while powered by USB interface when rainy. Accompany you no matter how bad the weather is. IPX7 Waterproof:Water jet resistant, and it can still work without influence even through the rain screens, splashing water, parking lot water. Real-Time Detection:Adopt advanced professional technology to ensure stable signal, accurate data, and instant response, sending alarm instantly when tire pressure is abnormal.