... Supply: DC 6V/500MA power supply, external power, built-in button batteries, when power normal travel time.Specifications:The digital clock displays ... -2099).A. in the normal display status, press the Snooze button (SNOOZE) to show the temperatureB. press again to show at ... free to switch. In the normal display state, press the button (DOWN) to conversion, when12-hour ON, the indication lights up ...