Mini Tire Preure Monitoring System CAR TPMS external Senor Wirele Why we need theTPMS(Tire Preure Monitoring System)? 1.Guard against accident 2.Real-time monitoring tire preure and temperture to prevent puncture 3.Extend tire life 4.Reduce wearing on the suspension system 5.Make driving more economical Functions and Features: 1.Real time monitor the preure and temperature of the tires. 2.Intelligent sleeping mode for power saving. 3.Tire leaking warning 4.Visual and audible warning for abnormal tire preure and temperature 5. 4 tires preure and temperature data at a glance 6. Fixed Bar or Psi preure unit for selection 7. Fixed temperature unit for selection Display: Emiion frequency:433.92MHZStorage temperature:-40~+80Charging temperature:-10~+65Operating Voltage:DC 3VWorking current:5mAShutdown/sleep current:100MA Sensor:Emiion frequency:433.92 MHzBattery model:1632Sensor chip:Germany infineon SP37Working temperature:-20-80Preure range:0-3.5 Bar