Product Function Introduction (1) Automatic radio-controlled time adjustment function (2) Time: January 1, 2000 to December 31, 2099 (3) Time, date and weekday display (weekday in 7 languages) (4) Time display format selection: 12HR & 24HR (5) Date display format selection: M/D & D/M (6) Two sets of alarms and snooze function (snooze time: 5 minutes) (7) Indoor and outdoor temperature and weather forecast function (7 types of weather) (8) Projection function: can project and display time and indoor and outdoor temperature (indoor and outdoor temperature switch every 5 seconds) (9) Temperature display unit selection: ℃ & ℉ (10) Temperature detection range: INDOOR: -9.9℃ ～ +50℃ & +14℉ ～ +122℉ OUTDOOR: -40℃ ～ +70℃ & -40℉ ～ +158℉ (11) 8 color changing cycle backlight function (effective when DC is connected) (12) Backlight function: DC power supply: high brightness → medium brightness → low brightness → off (cyclic) Battery power supply: lights up for 15 seconds, 8 color backlights can be selected (white, red, orange, yellow, green, cyan, blue, purple) (13) Working voltage: battery: 3.0V and DC: 4.5V