I will find out also. I just bought the same one today. My old sportsman was having trouble with the electronic thermostat. I couldn't get the knob to lower or raise temperature. It was 98 degrees at egg level. I had them in there about 5 days. I ended up putting my eggs in my hatcher and hand turning. I bought a new digital thermostat but then decided there was probably no way I could install it. I hope I like the new incubator and it gives me a lot of good hatching years. I hope my eggs still hatch.From what i hear the sportsman 1502, I just bought one myself so i'll find out. Everything i hear about them is good if you want to do some serious hatching, brinsea makes a couple differnt good smaller ones for smaller more hobby type hatching.