Features: 1. LED time display 2. 12/24 hour conversion 3. Alarm clock / snooze function 4. Temperature display (degree Celsius / Fahrenheit ) 5. Temperature range: 0 degree-50 degree 6. Night mode setting (18:00-06:00) 7. Mirror function 8. Time and temperature switch display 9. 2 brightness level 10. Five function buttons (MODE, ALARM, SNZ / LIGHT, UP, DOWN) 11. Time memory function (3XAAA battery for time memory) 12. Power consumption: 3 AAA batteries (not included) USB charging cable (included) 13. When the battery is charged or powered by the USB cable, a BI sound is emitted and the LED lights up. 14. While the battery is charging, press the SNZ / LIGHT button and the LED will illuminate for 5 seconds. 15. When using a USB cable, the LED indicator will always be lit.