Functions:❤12hr/24hr❤Calendar (date, week, year--2000 to 2099)❤Alarm and snooze (with 9 alarm music)❤Birthday reminding❤Countdown timer ( up to 23:59 )❤Temperature (Fahrenheit/Centigrade--0℃ to 50℃ or 32℉ to 122℉)❤Power Supply: DC 3VA. Battery: 2x AAA Batteries(not included)1) There is no battery, please insert the 2 pcs AAA batteries. Now you can hear music, it means you can set the clock. 2) Battery is to be inserted with the correct polarity.3) The supply terminals are not to be short-circuited.B. Time Setting: 1) After the music, the display showing 12:00,1/1, TUE (DAY), and the temperature is the present condition.2) Press Mode key to enter into time setting mode, the “12hr” would flashing, then press UP to select 12hr/24hr mode. 3) Press SET key to select setting the hour, minute, year, month and date. With UP key to adjust the value. C. Alarm Setting and Light: 1) At normal condition, press MODE key twice key to enter into alarm setting mode. 2) Press SET key to set hour, minute, and alarm melody. With UP key to adjust the value. 3) After setting, press UP key to turn on/off snooze function. 4) When alarm is on, if the snooze function is open, press UP key to enter into snooze function. Then the icon would be flashing. 5) Press MODE two times and press SET more times, when you see ----, the alarm has been turned off. D. Countdown Timer: 1) At normal condition, press MODE key for four times to enter into timer setting mode. 2) Press SET key to set hour or minute. The hour or minute would flash on the screen. Press UP key to adjust the value. After setting, press MODE key one time to confirm and exit. 3) The timer setting rang: Hour: 0~23; Minute: 0~59. 0:01 to 23:59. Package Included: 1pcs Digital Alarm Clock 1pcs User ManualNot suitable for metal surfaces with insufficient magnetism.