Used VWR magnetic hotplate stirrer model 720 advanced- 908 watts 115 v. Heating regulator working well, heats up pretty fast, the digital display shows the temperature. The stirring option doesn't works- sometimes it rotates then shows error message- the motor needs the fine adjustment to get the system fully functional.. 7"x7" hot plate ceramic, tiny chip at left corner.The item "VWR hotplate hot plate stirrer mixer magnetic digital model 720 advanced cvw" is in sale since Tuesday, September 01, 2015. This item is in the category "Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Heating & Cooling\Burners & Hotplates"." and is located in Derwood, Maryland. This item can be shipped worldwide.