This Shelton Scientific SH 300 Electrophoresis Power Supply is in great condition and is guaranteed to be fully functional. This unit came from a local lab that had surplus lightly used equipment. We urge customers to view all photos as they show overall condition, included accessories, and functionality. Please feel free to contact us with any questions. The SH-300 is the ideal power supply for horizontal electrophoresis applications from small mini gels to large format gels. The SH-300 has dual outputs and operational parameters can be determined by volts or amps. Power: 0, 3-120 watts Output range: 1-300 volts/1 volt Amps range: 1 to 400 mA Fault detection: Stop Suitable for mini submarine gel separations, large agarose gel electrophoresis and mini standard vertical gel applications.