* Description: digital thermo hygrometer
* Application: digital thermometer, room thermometer, indoor outdoor thermometer, thermo hygrometer
* Display Indoor temperaturer and humidity,Outdoor temperature;
* Record the maximum and minimum temperature and humidity;
* Deg C and deg F switch;                              
* Freeze from -1C to +4C;
* Temperature measure range: 
   Indoor:-10~+50C(+14~+122F)
   Outdoor:-50~+70C(-58~+158F)
* Humidity measure range:20~99%RH;      
* Accuracy: +/-1C,+/-5%RH;     
* Time and alarm                  
* 1.5V operate(AAA);