These Corning® stirring hot plates with the glass-ceramic Pyroceram® top feature digital temperature and stirring speed displays. Closed-loop heating and stirring controls that monitor and regulate both temperature and stirring speed. Microprocessor maintains consistent and repeatable temperature settings from 5°C (if ambient temperature is 0°C or lower) up to 550°C. Digital LED temperature display is adjustable in 5°C increments and blinks until set temperature is reached. Optional external temperature controller (Cat. No. 6795PR) truly controls temperature inside the vessel and eliminates the need to closely monitor liquid temperature. Exclusive closed-loop stirring control monitors and regulates the stirring speed from 60-1150 RPM for aqueous, viscous, or semi-solid solutions. Digital LED speed display gives you better control of your stirring process. Stronger, larger magnet improves stir bar coupling combined with automatic ramp up speed adjustment minimizes decoupling. Bright LED HOT TOP icon lights up when top plate is over 60°C, even when heat control is turned off. Separate temperature sensor provides power cutoff if unit overheats. Two piece casting design deflects spills away from electronics and includes a built in mount for an optional 18" (45.7cm) support rod (Cat. No. 440129). UL and CUL approved. 120V/60Hz model comes with standard US three-prong plug for use in North America and other areas with similar electrical requirements. 230V/50Hz model comes with United Kingdom plug. Two year warranty.