The new model both elements have a switch, 1 for the 1600w and one for the 900w, and you can turn both on for 2,500w. I BIAB, and a quick way to improve the bag is to use a couple of clothes pegs on the handles to shorten them, this gives you more space to dough in the grain without it coming out, as the bag is plenty long enough to reach all the way to the top. I have the one with the digital temp control and manual timer too. All in all it's a nice package for the price. Get the one off eBay, it's more up to date and comes with more bits.