Product review (3 stars): Okay, but signal is a bit weak.
The backlight is a great feature and, overall, I'm satisfied with the unit.  I'm using it INDOORS to monitor the temperature in the bedroom of an elderly parent.  However, even though the monitor is just down the hallway from my bedroom, the reception from the sending unit to the receiving unit is weak... and there are no walls blocking the signal, only the bedroom door.  If I had to do it again, I'd probably buy a baby monitor and pay a little more, but this unit is satisfactory.