1. Low price and high quality Although this product is affordable, the display is accurate, the error of the thermometer display does not exceed 1 degree, and the electronic watch is 100% accurate! The use of button batteries (AG10) is super power-saving, and the battery can be replaced every 2 to 3 years! 2. The self-contained suction cup does not affect the line of sight There is a circular suction cup on the back of this product, which can be firmly adsorbed on the glass surface and the smooth surface of the driving platform. This product is made of transparent glass material, even if it is sucked on the windshield, it will not affect the line of sight. 3. Resistant to high temperature and severe cold Temperature measurement range: minus 20 degrees to 100 degrees above zero, it is best to place it in the backlight, direct sunlight will affect the accuracy! Quantity delivered: 1 piece (including battery) Product color: white Product size: about 9.3cm *2.8cm