Features: Car-mounted LED mirror 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. 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 drivers and friends 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. Calendar Range: January 1, 2000 to December 31, 2099, temperature range: -9 to 50. Working Voltage: 5V (button battery CR2032: 3V). Specifications: for Shell Material: Plastic Mirror Material: Coated Glass Dial Material: Plastic Color: Blue/Green/Red/White(Optional) Clock Size: Approx. 40x72x18 mm/1.6x2.8x0.7 inch USB Data Cable Length: Approx. 1 for m/3.28 ft Applicable Places: Living Room, Bedroom, Study, Office, Kitchen, Public Places Display Screen Type: LED Display Type: Digital Special Functions: Thermometer, Luminous, Mirror, World for Time, Week Display, Month Display Note: Please allow 1-2cm errors due to manual measurement,pls 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: 1 Piece Electronic Digital Alarm Clock 1 Piece User Manual 1 Piece USB Data Cable