Zyle Kettle Specifications and Features You can use this kettle not only to boil water up to 100°C, but also to set it to a lower temperature. The kettle will also be easier to lift and put down. The device features an adjustable temperature, so you can not only boil water normally up to 100°C, but also set the exact temperature of 40 - 55 - 70 - 85°C to which you want to heat the water.