Tire Preure Monitoring System is a wirele RF sensing device designed to measure the tire preure and temperature, and LCD can display tire preure data. Once installed in your vehicle, the system will automatically monitor tires in rear-time for preure and temperature. When any tire's preure 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.Features:100% DIY installation.LED cigarette plug transceiver.Individual tire data showed.Wirele transmiion, no wires connection is needed.Real time monitoring.Visual and audible alarm.Fast / slow leakage alarm.High / low preure alarm. High temperature alarm.General:Brand: SteelmateModel: TP-74BPreure unit: BarPackage size: 15 * 12 * 6cm / 6 * 4.7 * 2.4inPackage weight: 265g / 9.3ozSpecifications:Valve-cap sensor:Operating frequency: 433.92MHz 0.05MHzOperating voltage: 2.0 ~ 3.3VOperating temp.: -20~+60Preure range: 0-3.5BarBattery model: CR1632Battery voltage: 1.8V ~ 3VBattery Life: 2yearsDisplay:Operating frequency: 433.920.05MHzOperating voltage: 12V3VOperating temperature: -20 ~ 70Default warning value:High preure value: 3.3BarLow preure value: 1.7BarHigh temperature value: 80Package List:1 * Display4 * Valve-cap sensors1 * Set of Acceory1 * Manual