The kettle uses a stainless steel heating plate to heat the water to 45°C-100°C/113°F-212°F. (Do not reheat cold drinks!) So you can enjoy delicious tea or coffee immediately, please fully charge them to heating, can not be used while charging. 45°C/113°F,55°C/131°F,80°C/176°F,100°C/212°F,4 gears temperature control, this portable constant temperature water warmer has a built-in temperature sensor chip, which can accurately control the temperature. 45°C/113° (min) to 100°C/212°F (max) . Real-time display of temperature.Farewell to repeated temperature measurements.