* 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;

* 1.5V operate ( AAA );

* Large LCD display;

* Use of the environment: -10~+50C