Car TPMS Car Tire Preure Monitoring System for Android Navigation With 4 Internal/external Sensor USB Android TPMS Why You Need?A tire preure monitor is definitely neceary for a car driver. It potentially prevents accidents and protects the tires. It also can save more fuel. With it, your car will work in the best condition. Main Features:- TPMS for Android navigation: the receiver can connect to the car DVD/multimedia player/GPS navigation, install the app (included in the U-disk), and check the tire data on the screen, very convenient to use- Quick air leakage alarm: real-time tire preure and temperature monitoring, with 4 tire data displaying on your DVD screen, prevent tire burst, extend the tire's life and save fuel - Abnormal alarm: after connecting to the car DVD, it will send you the sound prompt when abnormal occasions occur, such as high and low tire preure alarm, high temperature alarm, etc.- Accurate and durable: with advanced and profeional technology, ensure the stable signal and accurate data Specifications:Receiver- Working voltage: DC 5V- Working current: le than 15mA- Working frequency: 433MHz- Working temperature: -40 - 85 Deg.C- Connector: USBInternal sensor- Working voltage: 2.1 - 3.5V- Working frequency: 433MHz- Preure measuring range: 0 - 116 psi (0 - 8 bar)- Temperature measuring range: -40 - 125 Deg.C- Working temperature: -40 - 125 Deg.C- Battery: built-in CR2050 (3V, 330mAh) button cell