Features 1.Temperature range : ambient to 380 ℃ . PID control as well as inner and outer thermocouple . 2.Digital display for temperature Speed add , reduce and set . LED Display for stir speed add and reduce . 3.Stirring is Independently controlled with a variable speed control up to 1800rpm. 4.Capacity : 50ml - 20, 000ml for round bottom flasks . 5.Can be customized for beakers as your requests.