Oscilla® TSN-300 is a screening tympanometer with built-in memory. The tympanometer can do tympanometric tests at 5 frequencies as specified below. The progress of the test is depicted graphically in the display of the instrument. Tympanograms can be stored in the built-in memory which has a capacity of 20 tympanograms. Furthermore the tympanometer can be connected to a printer through the parallel port and transfer data to software programs like AudioConsole through the serial port. Specifications: 5 frequencies: 500, 1000, 2000, 3000 and 4000 Hz Test levels up to 110 dB Graphic: Tympanogram & reflex test Numeric values: Middle ear pressure (daPa) Ear canal volume: (ml) Compliance: (ml) Gradient: (daPa) AC Adapter 12V(220-240 V)