I need a high quality thermometer for the chicken coop -- one that will send temperature readings into my living room (via radio waves) 150 feet away. I had one, but it is going on the fritz. It's not the battery, cuz my electrician brother modified mine to run on AC power when it was originally installed a year and a half ago. It runs OK for a few hours, then it quits transmitting for a while, then transmits again. On and off. On and off. I just want to replace it with a higher quality one. Oh, yeah, I run two remote thermometers at one time (the other one for the greenhouse), so I need a receiver that is capable of receiving two or more channels at one time. What can you folks recommend? Thanks in advance for your insights and suggestions.