Car Tire Pressure Alarm Monitoring System Wireless TPMS LCD Display Car 4 External Sensor Alarm System Improve Fuel Efficiency     Features:   1. Real time monitoring tire pressure and temperature 2. Tire leaking warning and temperature balance 3. The display can be directly plugged into cigarette lighter 4. Beeping alarm and display the alarm value 5. Can support four tires, tire position can swap 6. Visual and audible warning for abnormal pressure and temperature Specifications: Sensor - Operating Frequency: 433.92 ± 0.1MHz - Working Temperature: -40 - 125 Deg.C - Working Current: Static current: No more than 1uA. Dynamic current: No more than 18mA - Pressure Range: 0 - 3.3 Bar - Working Voltage: 2.0 - 3.6V Display - Operating Frequency: 433.92 ± 0.1MHz - Working Temperature: -20 - 60 Deg.C - Working Current: Static current: No more than 30uA. Dynamic current: No more than 8mA - Working Voltage: 12 ± 3V Type (Fire Safety): TPMS external sensor digital tire pressure monitoring system Colors: Black       Package weight: 0.377 kg Product Size(L x W x H): 7.00 x 3.50 x 3.50 cm / 2.76 x 1.38 x 1.38 inches Package Size(L x W x H): 21.00 x 14.50 x 6.00 cm / 8.27 x 5.71 x 2.36 inches         Package Contents:   1 x Monitor, 4 x External Sensors, 1 x Spanner, 4 x Hexagonal Nuts, 1 x Special Cap Wrench, 1 x Dustproof gasket, 1 x English User Manual