Feature: - Built-in digital clock and thermometer, drivers can easily understand the time and temperature, so as to rationalize the driving time. - The large LCD screen can clearly display the time, date and seconds, and the visual effect is clear at a glance. - Using blue light, it is easy to know the current time at night with one click. - The dot matrix LCD electronic watch is full of technology and has a refined and streamlined appearance. Specification: Type: Car Digital Clock Thermometer Net Weight: 35.3g / 1.25oz Item Dimensions: 7.85 x 2.86 cm / 3.09 x 1.12 x 0.71 inches (L x W x H) Function: clock, thermometer Colour: Black Material: ABS Battery: 1*CR2032 (included) The package contains: 1 * Car digital clock thermometer Warn: It may vary from 1cm to 3cm due to manual measurements. Due to different monitor settings, the color deviation may vary, I hope you understand. installation method: Clock setting: press the A button for three seconds to set the hour, press the B button to adjust the hour value, then press the A button to set the minute, press the B button to adjust minutes (adjust the minutes, hours and seconds to 0) and then press the A key to confirm and exit. Press and hold B while adjusting the value to speed up. When setting, if no key is pressed for more than 60 seconds, it will automatically confirm and exit the setting. (Please read the manual for details)