This wireless thermometer has a main unit that stays in the grow room and has a mini display you can have outside the room allowing you to check conditions with out opening the grow room thus helping to reduce the chance of allowing pests and disease entering to the room.
this unit has:-
- window open / window closed indicator
- measures in / out humidity and temperature (C / F)
- memory for max and min humidity and temperature
- touch buttons for easy use
unit will require 3 AAA batteries for main unit and 2 AAA batteries for the sensor.