Product review (5 stars): Happy
Bought this item to replace the same which lasted well over 5 years before the outdoor transmitter died on me...and this was in use in humid and hot Florida.  Was always pleased with accuracy - I like the large display which can be read from across a 12' room.  Popped the batteries in, it instantly began to sync & I was sorta surprised that the old receiver picked up on the new outdoor transmitter.  Now I can have a unit in two rooms.  The old and the new display identical information - both indoor and outdoor temperatures and humidity readings.  Advice:  hang the outdoor transmitter in a protected/shaded area or the sun will throw off the reading a lot.  I hang mine beneath one of my Bahama window shutters.  I'm a happy user of this item for many years.