?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 ¡À 0.05MHz <br>Operating voltage: 2.0 ~ 3.3V <br>Operating temp.: -20¡æ¡«+60¡æ <br>Pressure range: 0-3.5Bar / 0-50PSI <br>Battery model: CR1632 <br>Battery voltage: 1.8V ~ 3V <br>Battery Life: ¡Ý2years <br>Display: <br>Operating frequency: 433.92¡À0.05MHz <br>Operating voltage: 12V¡À3V <br>Operating temperature: -20¡æ ~ 70¡æ <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¡æ <br><br><strong>Package List:</strong> <br>1 * Display <br>4 * Valve-cap sensors <br>1 * Set of Accessory <br>1 * Manual