The STC-1000 has separate heating and cooling circuits, it seems like that could do both jobs in one.
CC:
Just bought one for my bater....and it does have a turn on and turn off setting....it seems fairly accurate. my experience was to set them 1/2 degree C different....the bater would go on for about 1.5 mins...then shut of for about 40 sec...then turn back on...I think the variance is .1 degree C......