With the OXO Brew Adjustable Temperature Kettle, you can select the precise temperature for your tea or coffee with a simple twist of a knob. Choose any temperature between 104 and 212°F, and the water is heated and held at your preferred temperature for up to 30 minutes. The Kettle is cordless when removed from the base, with a silicone base so you can bring it to the table without worrying about damaging surfaces. The crystal-clear, BPA-free borosilicate glass ensures a pure, clean taste.