The Z-1 Evo IAS features an external port designed to hold the Skytronic GFX (it will also hold the Pro-Track, Pro-Dytter, and Neptune audibles). The IAS option allows skydivers to operate the Skytronic GFX (or other instrument) without removing it from the helmet, giving easy access to all the functions of the instrument, like the extended jump information, programming, altitude check, and so on. It also allows you to view the graphic display, a useful feature during formation jumps where other skydivers may be able to view the altitude and visual alarms. The Skytronic GFX (or other instrument) is held in place by a specially designed holder and can be removed if necessary without using any tools.
Includes a soft spacer that allows you to compensate for slightly different instrument sizes.
Note: The size of the Z-1 Evo IAS can be adjusted by simply changing the liner.