Projection Clock    The main function    1) the date， time， temperature display can be switched or slideshow    2) projection display can be flipped 180 degrees    3) 12 hours or 24 hours format selection    4) Optional Celsius or Fahrenheit    5) 2000-2099 Almanac inquiry    6) 3 group alarm timer and snooze function    7) 16 world music appreciation    8) Birthday    9) is timing and countdown    10) Color backlight     Projection Clock  The main function  1) the date， time， temperature display can be switched or slideshow  2) projection display can be flipped 180 degrees  3) 12 hours or 24 hours format selection  4) Optional Celsius or Fahrenheit  5) 2000-2099 Almanac inquiry  6) 3 group alarm timer and snooze function  7) 16 world music appreciation  8) Birthday  9) is timing and countdown  10) Color backlight  External power supply， the need to reprovision