Know the real time air pressure and temperature for tires on the screen. Gives you early warning of air leaks and other abnormal tire situations so corrective action can be taken and tire life can be extended. When the air pressure or temperature of any tire goes outside the predetermined range,both the monitor display and an audible alarm warn you.You're also warned when the battery of a tire sensor is low. Features - Color: Black. - Material: ABS, metal. - Size: About 8.5x9.5x2.6cm/ 3.34x3.73x1.02 inch. - Lets the driver get the real-time tire pressure data, temperature data and status, always keeping an eye on your car's performance. - Solar energy powered, which has the characteristics of green, low carbon and renewable advantages, enabling you to charge the device faster and greener. - Real Time: Support shows four wheels' tire pressure and temperature simultaneously,high/low tire pressure alarm, high temperature alarm and air leakage condition alarm. - Accurate: The real-time tire pressure data, visual and audible warning for abnormal pressure and temperature, very convenient and practical. - High-definition color screen display, supports solar energy charging. Specification Tire pressure main engine parameter: - Operating voltage: 3.7-5V. - Storage temperature-30 C-90 C. - Working temperature-30 C-85 C. - RF Emission frequency433.92MH plusmn;50KHz. - RF Signal sensitivity-90dbm. - Display modeLCD Color. - Bright screen current le;6mA. - Black screen current le;4mA. External sensor parameters: - Battery life24 months. - Operating voltage2.1-3.6V. - Storage temperature-30 C-90 C. - Working temperature-30 C-85 C. - Temperature resolution plusmn;2 C25 C. - Pressure range:0-7.0Bar. - Pressure resolution plusmn;0.1Bar. - Waterproof gradeIP67. - Transmitted power le;10dBm. - Emission frequency433.92MHz.