Operation:

1,Remove the battery cover and insert one new battery 1,5V AAA,polarity
as illustrated,close the battery cover again

2,The device will alert with a beep and all LCD segments will be displayed
and backlight flash for a short moment

3,Then the default display:

TIME:2015-1-1, AM,12:00; ALARM: AM,12:00, OFF

Hour system: 12hr; Temperature unit: °C

Backlight:ON