LED Digital Alarm Clock Silent Smart Temperature Date Luminous LargeScreen Desktop Makeup Mirror(Blue ) Item Type: LED Digital Alarm Clock Material: ABS Size: Approx. 14.6 x 7.4 x 3.6cm / 5.7 x 2.9 x 1.4in (manual measurement, slight error) Purpose: Suitable for children, the elderly, can be used in the bedroom, office, home and school How e: USB plug-in use/3 x AAA batteries use Battery Type: 3 x AAA batteries (not include) Number of Light Levels: 2 Levels Features: 1. LED time display. 2. 12/24 hour clock. The date displays "month", "day", "year" (from 2000 to 2099). 3. Alarm clock and snooze. 4. Temperature Display: ℃/℉. 5. Temperature Range: -10℃~50℃. 6. Night Mode (18: 00-6: 00), the LED light will automatically dim at night time and brighten during day time. 7. Two Levels of Brightness Adjustment: Bright and dark 8. 5 Function keys (MODE, ALARM, SNZ/LIGHT, UP, DOWN) 9. Time memory function (3 x AAA batteries drive) How e: 1. When the battery is inserted, or the USB cable is plugged in, the BI sounds, and the LED light is on. 2. When driving with battery, press (MODE, ALARM, SNZ/LIGHT, UP, DOWN) button, and the LED screen will be on for 15 seconds. 3. When driven by the USB cable, the LED screen is always on. Function Button: A. Press the MODE Button to Switch the Display: Time-date-temperature-night ON/OFF b. Press the UP key to switch between the two brightness adjustments of the lamp c. In the time mode, press the ALARM key to display the alarm mode d. In the alarm mode, press the ALARM button to switch the alarm function