... lithium battery, charging LED indication (Indicator light when under charging condition, indicator off when charge full)Calendar Alarm SpecificationUSB 5V/500 mA3 ... will back from set mode, and display the time.Under normal mode, press UP transfer 12 and 24 hours ... format. Snooze functionUnder normal mode, press MODE enter alarm mode.Under alarm mode, press “SET” enter alarm setting, press “SET” ...