Usage Tips:Digital Car Thermometer Clock with Blue Backlight for Air Vent Clip on 12H 24H Display Compatible with Auto Truck Features： 1、2-in-1 multifunctional digital display, real-time display of time and temperature, support 12/24 hour system switch, accurate and clear values. 2、With backlight design, press the switch to turn on, easy to view at night. Long press the switch will reduce the brightness by half, and automatic shutdown after keeping on for 4 hours. 3、The thoughtful clip design, you can clip it on the car air conditioning vents, can also be clipped to the computer, desk lamp, etc. 4、Equipped with 2 L44 button battery, low power consumption and long endurance. After replacing the battery, the time needs to be reset. 5、High-quality plastics housing, sturdy and has nice durability. Compact size, novel shape, easy to install and use. Specification： Features: 2-in-1 multifunctional digital display, real-time display of time and temperature, support 12/24 hour system switch, accurate and clear values. With backlight design, press the switch to turn on, easy to view at night. Long press the switch will reduce the brightness by half, and automatic shutdown after keeping on for 4 hours. The thoughtful clip design, you can clip it on the car air conditioning vents, can also be clipped to the computer, desk lamp, etc. Equipped with 2 L44 button battery, low power consumption and long endurance. After replacing the battery, the time needs to be reset. High-quality plastics housing, sturdy and has nice durability. Compact size, novel shape, easy to install and use. Specifications: Color: Black Material: Plastics Battery: 2 * L44 Button Battrey Item Size: 85 * 24 * 24mm/ 3.3 * 0.9 * 0.9in Item Weight: 20g/ 0.7oz Package Size: 95 * 35 * 25mm/ 3.7 * 1.4 * 1.0in Package Weight: 34g/ 1.2oz Packing List: 1 * Car Clock Temperature Meter Package List： 1 * Car Clock Temperature Meter