The T4 is designed for Air Conduction Testing. It is wireless the operation is computer controlled. The test modes are both manual and automatic. It has a fully customizable test protocol. The Amplitude T-Series is a concept in audiometry that is unique and entirely new. The patient response switch has the audiometer built right in. The T4 model offers portability and flexibility for enhancing the productivity of the air conduction. This device is suitable for use in scholastic, primary care, mass-screening settings and occupational hearing health. The T4 is wireless and it connects reliably and quickly to any PC. In tester subject positioning it affords the maximum flexibility that can be offered. The Symphony software suite controls patient data.