Features: Brand new and high quality Real time monitoring tire preure and temperature Tire leaking warning and temperature balance LCD display screen, Simple user interface The display can be directly plugged into the cigarette lighter Beeping alarm and display the alarm value Can support four tires, tire position can swap Visual and audible warning for abnormal preure and temperature Sensor Specification: Please install in by Profeional car center More stable and accurate Operating frequency: 433.92Mhz0.1MHZ Working Temperature: -30~85 Operating Voltage: 3.7-4.2V Working current: static1uA, working current15mA External Sensor (Optional): Easy to install, convenient to replace Dust-Proof / Water-Proof / Anti-theft Operating Voltage: 2.6-3.3V Working current: static50uA, working current15mA Working Temperature: -30~85 Accuracy: temperature: 1, preure: 0.1bar Package Included: 1 x Tyre Preure Monitoring System 4 x External sensors 1 set x Acceories (tool)