Product description *1.owerful TPMS: Monitors tire pressure and temperature condition in real time, which will transmit real-time data to the audio player of your car to remind the driver for the comfortableness of vehicle and driving safety. *Wide application: This system is widely suitable for vehicle with four tires and the maximum pressure of the tire is below 8 bar, such as a commercial car, for jeep, off-road vehicle, minibus, and sedan car, etc. *Digital display: Includes a TPMS receiver, four external sensors, and a U disk. The real-time data of tires will be sent to the DVD through USB port, so you can know the status of your car easily and comfortably from the car audio player. *4 external sensors: Provides four sensors, which are suitable for using in any type of weather. Besides, they are in high sensitivity and good accuracy for measuring pressure and temperature. Specifications:External sensor: 1.Battery: built-in CR2025 button cell 2. Working voltage: 2.1 - 3.5V 3.Working temperature: minus 30 - plus 60 Deg.C 4.Temperature measurement range: minus 30 - plus 85 Deg.C 5. Pressure measurement range: 0 - 116 psi 6.Transmission frequency: 433.92MHz TPMS receiver: 1. Working voltage: DC 5V 2. Working current: less than 15mA - Working frequency: 433.92MHz - Working temperature: minus 40 - plus 85 Deg.C - USB cable length of the receiver: about 220mm - Please note that our USB TPMS receiver isonly suitable for Android audio player