KUNFINE USB Android TPMS Tire Preure Monitoring System Display Alarm System 5V Android Navigation Car Radio With 4 Sensors Main Features: 1.TPMSfor 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 2.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 fue 3.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 4.Accurate and durable: with advanced and profeional technology, ensure the stable signal and accurate data Specifications:ReceiverWorking voltage: DC 5VWorking current: le than 15mAWorking frequency: 433MHzWorking temperature: -40 - 85 Deg.CConnector: 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 Please note that our USB TPMS receiver isonly suitable for Android DVD system External TPMS Internal TPMS