Mode:HTC-1
Features：
(1)℃／℉ Display format selectable.
(2)Maximun/minimum temperature and maximum/
  minimum humidity
(3)Max/min temp,memory
(4)Clock function display of"hour","minute",and
  "AM/PM",Time format switch able(12/24 hours
   format selectable)
(5)Alarm Mode
(6)Day and Month display calendar
Function:
Range:-50℃~70℃，（-58℉~158℉）  ±1℃（±1.8℉）
Hygro range:10%RH to 99%RH 
Accuracy:±1℃.RH±5% 
Measuring period:10 seconds 
Dimension :  100mm(L) x 108mm(W) x 20mm(H)
Weight : 160g
Power Source : one 1.5V battery