Interacoustics AS608 Instructions For Use Manual page 23

Press Save to return to the main setup menu.
License.
Press Change to access the license key of the AS608/AS608e instrument.
Press Change to enter and/or modify the license key of the AS608/AS608e instrument.
Use button 2 to change the letter and button 1 to move the cursor
Press Save to return to the main setup menu.
About
Press Change to access the information in the About section.
Press Back to return to the main setup menu.
Press Save to return to measurement screen of the AS608/AS608e.
D-0127810-A – 2020/05
AS608 - Instructions for Use - US Page 19