This instrument is not working, and is sold as-is without warranty.
Fisher Scientific 550 Sonic Dismembrator with Ultrasonic Converter
Ultra-high power with advanced programming for all liquid processing applications, 220V. Includes standard 1/2 in. Replaceable tip probe (#FB4220) for processing 20-250 mL volumes. There are many probe size options available which allow for processing 0.2-1000 mL volumes.