AN-11 Solar Car TPMS Touch Switch Auto Tire Preure Monitoring Tyre Temperature Alarm Warning System Feature: High-efficiency solar panels, super long battery life. Large-capacity built-in metal lithium battery, no worry in cloudy days. Accurately monitor tire preure stability all the way. High precision LCD display. Multiple tire preure units are available. Long receiving distance, stable signal. Tire position interchange. Specification: Air preure setting range: 1.0~3.5bar Temperature setting range: 40~68 Working temperature: -20~+80 Storage temperature: -30~+85 Power-on voltage: DC 5V Frequency: 433.92MHz20.00MHz Size: 95*80*27mm/3.74*3.15*1.06" Weight: 68g Sensor type: External, Internal (Optional) Gro weight: 180g (external), 280g (internal) Note: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not reflect the actual color of the item because of different pographing light, angle and display monitor. Package Include: 1 X Receiver4 X Sensors1 X USB Cable1 X Installation Kit for External Sensors (Optional)1 X Manual