Grason Stadler GSI-33 V2 Tympanometer. This unit has been fully tested, and is operational.This unit is clean, display is bright and clear, pump is tight and printout is clear. Please note that this item can be used in 110 and 220v, a small adapter will be provided for 110v countries. The item "Grason Stadler GSI-33 V2 Tympanometer Tested, Working" is in sale since Sunday, November 27, 2016. This item is in the category "Business & Industrial\Healthcare, Lab & Life Science\Medical Instruments\Exam & Diagnostic\Other Diagnostic Instruments". The seller is "techtrader-worldwide" and is located in Paris. This item can be shipped worldwide.