Energy efficient induction cooking. The SI3642B built in induction hob from Smeg gives you rapid cooking times while boasting energy efficiency. Induction hobs heat the pan instead of the air around them, concentrating the heat where it should be and preventing wastage. It makes the hob really energy efficient, saving you money on your bills. The 4 zones vary in size to accommodate large and small pan sizes and each have a booster if you need that extra bit of oomph! They are 9 power levels to choose from so you can really tailor the temperature depending on what you’re cooking. The visual display shows you the power level selected, when the hob is cool enough to touch, as well as the countdown timer. The child safety lock prevents any of the settings being tampered with when you’re not around. It’s worth noting only pans with a ferrous (magnetic) base are suitable for induction. You can’t use pans with glass and copper bases on an induction hob.