... led clock 2. hiding calendar 3. 12/24 hour conversion 4. temperature display 5. cell battery inside ... , automatic switching display (optional), 12/24 hour, can be 12/24 hour conversion, the default 24 hours.3. Alarm: In 2011, ... to stop the alarm function.4, 12 / 24 hour free to switch. In the normal display state, ... press the button (DOWN) to conversion, when12-hour ON, the indication lights up when it is ...