To connect to a computer and adjust your iHEAREVA device, you will need to purchase the iHEAR EVA Programming Kit ($149), which includes the iHearTest/iHearUSB Programmer and a Programming Cable. These items allow you to connect your iHEAR device to your computer so that you can adjust the device's settings using the iH TUNER software application. While the Programming Kit is not required, you will not be able to program or adjust your iHEAR device without it. Please contact Customer Support if you have questions: 1 (844) 443-2744 or support@ihearmedical.com.