This is the Indoor / Outdoor Wireless Thermometer by Acu-Rite. The display sits on my desk. It has a push button at the top for
selecting indoor or outdoor mode. The sensor hangs on a hook outside under a deck. I am not sure how long the batteries will last.
Each unit has Duracell Batteries. The indoor display uses 2 AAA batteries. The outdoor sensor uses 1 AA Batteries.
I am not sure how long the batteries will last. As I write this it is December 2014. The Indoor Outdoor Thermometer was purchased on June 5, 2014.,
It continues to run on the original batteries..
There is a signal strength meter when set to the Outdoor mode. This one typical shows one bar with separation between the outdoor sensor and indoor
display being about 110 feet.
So far I am very satisfied.
My office is in the basement, so the indoor mode is used just as much as the outdoor mode. I like to get the indoor temperature in the
mid 70s in the winter time. With electric baseboard heating this thermometer lets me know when the temperature is right!
There are many great 5 star reviews on this Acurite Digital Indoor / Outdoor Wireless Thermometer 00380W with Daily High/Low!