LCD Clock Date Temperature Display Mute Electronic Backlight Alarm Clock Countdown Timer Item Type: LCD Clock Material: ABS + Acrylic Battery Model: 3 x AAA batteries (not include) Function: Backlight, perpetual calendar display, digital thermometer, music alarm clock, snooze function, reverse timer, music appreciation, birthday reminder How e: 1. Insert 3 AAA Batteries, Enter The "normal Display State", And play 1 piece of music. LCD display is: 12: 00 1/1 THU 2. In The Normal Display State, Press The MODE Key To enter the corresponding functions: Normal State: 12Hr/24Hr-alarm clock, birthday reminder, timer 2.1 In the normal state, press the MODE key once to enter the 12Hr/24Hr state, and then press the UP, DOWN key to switch to 12/24 hours, and press the SET and "UP, DOWN" keys to set the time and date. 2.2 In the normal state, press the MODE button twice to enter the alarm state, the ALARM symbol is displayed, press the SET button and the UP, DOWN button to set the alarm time and select the alarm music, a total of 7 Music and 2 different "di di" sounds are available. Press the SET button again to turn off the alarm function. When the set alarm time arrives, the alarm will sound for 1 minute. 2.3 In the normal state, press the MODE button three times to enter the birthday reminder state, press the SET button and the UP, DOWN button to set the date and time of the birthday reminder; press the SET button again to turn off the birthday reminder function. When the time set by the birthday reminder arrives, a 5-minute birthday song will be played. 2.4 In The Normal State, Continuously Press The MODE Button Four times to enter the timer state, there is a TIMER sign display, press the SET button and the UP, DOWN button to set the reverse timing time, the timing range: 23: 59 -00: 00 Hours. When The Set Time Reaches "0: 00 00", An Alarm Will Sound For 1 Minute And "0: 00 00" will flash continuously. Press any key to stop the alarm. 3. In the normal state, when the alarm symbol ALARM is displayed on the top of the LCD screen, press the UP key to turn on/off the snooze function. The SNZ at the top of the LCD screen will be displayed and not displayed accordingly. 4. In the normal state, press the DOWN key to turn on/off the music appreciation function. When turned on, 7 different music can be played in tour. 5. In the normal state, press the SET key to realize the Celsius/Fahrenheit temperature conversion. In the above various states, if there is no button for 1 minute, it will automatically return to the normal display state. 6. In any state, press the LIGHT key to turn on or off the backlight function. It will automatically shut down after 5 seconds. 7. This product uses 3 AAA batteries. If the display is not clear, please replace the battery.Size: Approx. 11.5 x 10.3 x 7.4cm / 4.5 x 4.1 x 2.9in