Features: Can test at most 6.3bar, universal fit for vehicles under 3.5bar. Come with USB3.0 interface, you can charge your phone, tablet on it. Long standby time, with 4 external / internal sensors, easy installation. High accuracy, stable performance, heat resistant, low power consumption. Cigarette-lighter powered, no wire needed, with LED high-definition digital display, real-time monitoring, intelligent voice alarm, angle adjustable. Specifications: Material: ABS Main Host: Receive Frequency: 433.920.02Mhz Working Temperature: -20 to 85 Working Voltage: 3.7V External Sensor: Receive Frequency: 433.920.02Mhz Modulation Modes: ASK Working Temperature: -20 to 80 Pressure Range: 0-3.5BAR Battery Model: 1632 Internal Sensor: Receive Frequency: 433.920.02Mhz Modulation Modes: ASK Working Temperature: -20 to 125 Pressure Range: 0-3.5BAR Battery Model: CR2050 Size: Approx. 13.5x13.5x5cm/5.31x5.31x1.97in Type: English Internal/English External Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: Package A: 1x Tire Pressure Monitor, 4x External Sensor Package B: 1x Tire Pressure Monitor, 4x Internal Sensor