Product review (2 stars): A Short Operating Life
This item was easy to set up and initially appeared to operate well.  It required four AA batteries, two for the transmitter and two for the receiver.  When I placed the transmitter in the room with the receiver, the two temperature readings were the same.  When i took the transmitter outside, the unit seemed to be operating properly.  After seven weeks of operation, however, the outside transmitter apparently stopped working.  I replaced the batteries in both units, and the unit started up OK, but the transmitter quit again after a couple hours.  Seems to me I should get more than seven week's operation for my money.  To be fair, the transmitter was in sunlight for a couple of hours each day; I live in an apartment and have no place to put it that's completely shaded.  Maybe I was asking too much of this unit.  Certainly I will not buy another one.