Features： 1、USB tire pressure monitor, real-time monitoring of 4 tire pressure and tire temperature, to ensure driving safety. 2、It is compatible with most Android car DVD/navigation systems in the market, wireless transmission, easy to view. 3、Equipped with 4 high-accuracy sensors, it is sturdy, waterproof, high temperature resistant, easy to install and use. 4、When the tire pressure or temperature is abnormal, the system will sound an audible alarm through the car speaker. 5、Supports automatic hibernation when parking, automatic wakeup at startup, energy saving, and long battery endurance. 6、Wide range of applications, it is suitable for sedan car, off-road vehicle, commercial vehicle, SUV, etc. Specification： Car tire pressure monitoring system for Android car DVD/navigation systems, real-time monitoring and display of tire pressure and tire temperature, if there is any abnormality, it will alarm in time to ensure driving safety. Features: USB tire pressure monitor, real-time monitoring of 4 tire pressure and tire temperature, to ensure driving safety. It is compatible with most Android car DVD/navigation systems in the market, wireless transmission, easy to view. Equipped with 4 high-accuracy sensors, it is sturdy, waterproof, high temperature resistant, easy to install and use. When the tire pressure or temperature is abnormal, the system will sound an audible alarm through the car speaker. Supports automatic hibernation when parking, automatic wakeup at startup, energy saving, and long battery endurance. Wide range of applications, it is suitable for sedan car, off-road vehicle, commercial vehicle, SUV, etc. Specifications: Color: Black Material: ABS Sensor Type: External Sensor / Internal Sensor(optional) Receiver-- Working Voltage: 12 V Working Current: ≤15mA Working Frequency: 433.92MHz Working Temperature: -20-80℃ Storage Temperature: -30-85℃ Interface: USB Item Size: 62 * 42 * 15mm/ 2.4 * 1.7 * 0.6in External Sensor-- Battery: 1 * CR1632(180mAh) Standby Current: <0.7μA Temperature Measurement Accuracy: ±4℃, -20-50℃ Working Temperature Range: -20-60℃ Pressure Measurement Range:0-8Bar Emission Current:<8mA Item Size: 20 * 20 * 16mm/ 0.8 * 0.8 * 0.6in Internal Sensor-- Battery: 1 * CR2050(350mAh) Standby Current: <0.7μA Temperature Measurement Accuracy: ±3℃, 0-70℃ Working Temperature Range: -40-125℃ Pressure Measurement Range:0-8Bar Emission Current:<10mA Item Size: 76 * 53mm/ 3.0 * 2.1in Package Size: 220 * 170 * 50mm/ 8.7 * 6.7 * 2.0in Package Weight: External Sensor: 200g/ 7.1oz                            Internal Sensor: 280g/ 9.9oz Packing List: 1 * Tire Pressure Monitor 4 * Sensor 1 * Wrench 4 * Nut 1 * User's Manual Package List： 1 * Tire Pressure Monitor 4 * Sensor 1 * Wrench 4 * Nut 1 * User's Manual