I STRONGLY recommend getting this over the reptitemp 500R
http://www.amazon.com/Hydrofarm-MTPR...5106504&sr=8-6
Extremely accurate, Off/on style, Long probe cord, DIGITAL (thats important, digital is 100% better than dial)
I have used it for a few months now and its doing perfectly, I love it and I would HIGHLY recommend it to anybody who cannot afford the 100 - 300$ proportional ones
Good luck![]()