Grason-Stadler GSI-39  - Screening Tympanometer and optional    Audiometer (versions 3 & 4)  - Standard with Ipsi Reflex on all versions  - Optional Contra Reflex (versions 2 & 3)  - Optional 1KHz Probe Tone on all versions  - Very quick test results  - Electronically transfers data to optional    AudBase Software  - Our most popular screening tympanometer  - Click here for a .pdf brochure     Madsen Zodiac 901 Middle-Ear Analyzer - Large, clear high resolution graphics display - Quiet built-in thermal printer option - Flexible probe solution can be hand-held or used with shoulder harness - Screening and Diagnostics modes - Click here for .pdf brochure  Welch-Allyn MicroTymp2  - Screening Handheld Tympanometer  - Provides test results in seconds  - Prints in seconds  - Printout includes graphical and numeric results  - LCD provides review of test results  - Click here for a .pdf brochure  Grason-Stadler GSI Tympstar  - Industry leading Middle Ear Analyzer  - Automatic or manual 226Hz testing  - Multi-Frequency testing available (version 2)  - Four test modes: tympanometry, reflex,    reflex decay, and eustacian tube function   - Electronically transfers data to optional    AudBase Software  - Click here for a .pdf brochure Madsen OTOflex 100 Diagnostics Imittance Device - Intuitive user interface - 226 Hz and 1000 Hz probe tones - Full range of Ipsi and Contra reflex thresholds and decay stimuli - Reflex screening, threshold, and decay tests - ETF tests - Click here for .pdf brochure