You’ve got an array of technological gadgets in your belt—an anti- grav booster, a narrowbeam comm projector, a holoshell and so forth. You can use these gadgets to cast a non-magical duplicate of utility spell (13th Age core book, page 150) once per battle or scene. You cast the spells at your level, or one level below. You need to make an Intelligence skill check to pull off the effect. The DC for the check depends on the effect desired:

Featherfall: DC 15
Disguise self, hold portal: DC 20
Message, levitate, “speak with item”: DC 25
Water breathing, scrying: DC 30

If the test fails, you fail to cast the “spell” and you can’t use your survival belt again until after the battle or scene.

About the belt: The technological version of speak with item doesn’t let you talk to a magic item, but does let you analyse the physical composition of an object, detect hidden forensic traces and so forth, which gives you roughly the same information as a speak with item spell. (The belt is genetically keyed to its owner, by the way, so it can’t be used by anyone else. It is also nearly impossible to remove by someone unfamiliar with it, except through ingenuous lockpicking or massive force.)