Calendar Range: January 1, 2000 to December 31, 2099, temperature range: 9℃ to 50℃ Power Supply Mode: equipped with a button battery and can be charged with a USB data cable The light is bright and the handwriting is large, which is very suitable for and to use in the car Note the First Use: first plug in the power cord, the device will start automatically, about 8 seconds, and the for time will be displayed after the start Working Voltage: 5V ( button battery: 3V Car-mounted LED clock can be used as a car-mounted temperature clock, with for time, temperature, and date, and can be used for carousel When the car is turned off, the for time will be automatically synchronized