KD-1A in out digital Thermometer Clock

KD-1A shows both temperature and time simultaneously, switch the indoor and outdoor temperature by pressing the FSW button.
Celsius / Fahrenheit switchable, powered by an AAA dry battery,
The temperature measuring ranges are:
(1) -30 to +50 or -22/122°F for inner sensor;
(2) -50 to +70°C or -58/158°F for outside sensor