The heat reflective glass of the Neff B15P42N0GB helps to keep all the heat inside the oven, making for shorter cooking times & a safer oven, especially with little ones around. To help keep you & any small hands safe there is a child safety lock too. The ' Actual Temperature Display' shows you the actual temperature in the oven, so you know when it's warmed & ready for your meal; no more undercooked meals.