Tire Pressure Monitoring System is a wireless RF sensing device designed to measure the tire pressure and temperature, and LCD can display tire pressure data. Once installed in your vehicle, the system will automatically monitor tires in rear-time for pressure and temperature. When any tire's pressure or temperature appear abnormal, the system wil, in rear-time, transmit signals to activate an alarm to warn the driver of tire problem. TPMS can help you to avoid tire accidents due to tire failure, to reduce the fule consumption and to extend the tire life. <br><br><strong>Features:</strong> <br>100% DIY installation. <br>LED cigarette plug transceiver. <br>Individual tire data showed. <br>Wireless transmission, no wires connection is needed. <br>Real time monitoring. <br>Visual and audible alarm. <br>Fast / slow leakage alarm. <br>High / low pressure alarm. High temperature alarm. <br><br><strong>General:</strong> <br>Brand: Steelmate <br>Model: TP-74B <br>Pressure unit: Bar / PSI (optional) <br>Package size: 15 * 12 * 6cm / 6 * 4.7 * 2.4in   <br>Package weight: 265g / 9.3oz   <br><br><strong>Specifications:</strong> <br>Valve-cap sensor: <br>Operating frequency: 433.92MHz ± 0.05MHz <br>Operating voltage: 2.0 ~ 3.3V <br>Operating temp.: -20℃～+60℃ <br>Pressure range: 0-3.5Bar / 0-50PSI <br>Battery model: CR1632 <br>Battery voltage: 1.8V ~ 3V <br>Battery Life: ≥2years <br>Display: <br>Operating frequency: 433.92±0.05MHz <br>Operating voltage: 12V±3V <br>Operating temperature: -20℃ ~ 70℃ <br>Default warning value: <br>High pressure value: 3.3Bar / 47PSI (unit is optional) <br>Low pressure value: 1.7Bar / 25PSI (unit is optional) <br>High temperature value: 80℃ <br><br><strong>Package List:</strong> <br>1 * Display <br>4 * Valve-cap sensors <br>1 * Set of Accessory <br>1 * Manual