Suitable for Various Heat Resources Applicable for gas, natural gas, induction cooker and electric furnace, halogen, radiant stoves, wood stove etc.It is not suggested to use large fire to boil water, as it will make the kettle's body brown and char - affect the appearance. Ergonomic Heat Resistant Handle The wood handle allows you to grab the tea kettle with bare hand without burns. The ergonomic design with simple-touch button provides comfort, easy open & close. Two Water Filling Methods You can open the lid to fill the water as normal.Unique design of the spout opening angle enables you quickly fill the water through the spout. Please Mind the Whistling Water Line The loud whistle grab your attention while you are focused on other issues. Please make sure that the kettle lid and spout lid are completely closed, and do not overfill the kettle(please fill water below the bottom of spout), or the whistle may not work. Thickened Fast-Heat Bottom This tea kettle is designed with a three-layer thickened base that maximizes heat conduction bottom that heats up quickly and evenly.Less waiting and a more efficient tea or coffee brewing experience for you!