It measures indoor-outdoor temperature and humidity.

MAIN UNIT:
1.It can receive the signal of three sensor units,and display them on the screen,the distance about 30M in the open field;
2.Measure the Indoor temperature and humidity,
  Measure Range:-10C--60C or 14F--140F
                20%RH--80%RH,
  Accuracy:+/-1C or +/-2F,+/-5%RH;
3.Display Date,Time and time alarm;
4.Max/Min indoor temperature and humidity memory;
5.Back light ;
6.Weather prediction;
7. Celsius and Fahrenheit switch.  

PARAMETER:
1.Size of the product:142*80*31mm,
   Screen size:53*44mm;
2.Eight keys:ADD,CODE,C/F,MAX/MIN,SUB/CLR,ALARM,CLOCK,LIGHT;
3.Use three LR6 AM3 AA/1.5V alkaline batteries;
4.Light colour:Green.


ACCESSORY UNIT (SENSOR):
1.They can send the signal to the Main Unit;
2.Measure the Outdoor temperature;
  Measure Range:-20C--70C or -4F--148F;
  Accuracy:+/-1C or +/-2F;
3.Max/Min ondoor temperature memory;
4.Celsius and Fahrenheit switch;
5.Proof water;
6.It can be hanged on the wall or puted on the table.