LED clock with sound controlled
Functions:
*time display, 12/24 switchcover
* daily alarm
* snooze function with 5 minutes interval
* calendar function, display year (year 2000-2099), month, date and day
* sound controlled
* temperature function
* auto switch display function
* manually adjust brightness: high-brightness, half-brightness, no brightness
* external power off protection function: load in build-in battery