Description:-Double temperature inside and outside the car-12/24V car universal, ultra-simple installation-Vehicle-mounted high temperature and vibration resistance-bracket angle adjustment, rubbing and fixing.--5M car impact and probe wire-low power consumption, super power saving-Temperature measuring range: inside the car:-20 ~+70 C.Outside:-50 ~+70 C.Installation:1. Fix the product on the car, place the outdoor probe outside the door, install an AG10 battery, and the LCD displays the current temperature inside and outside the car.2, plug in the car power supply, the product appears blue backlight.3. If there is no vehicle power supply and backlight, it is only the product to test the temperature inside and outside the vehicle.Package includes:1x Thermometer1x Manual1x Charger cable