• Tympanogram function
• Good eardrum function
• Ear film perforation Eustachian tube function
• Ipsilateral and contralateral sacral muscle reflex threshold experiments
• Ipsilateral and contralateral acoustic attenuation experiments
• Latency test
• 7-17mm full earbuds for adults and infants
• Large-screen LCD display test results and curves
• Test results can be stored
• Menu function selection, automatic/manual test mode