The fastening system can be used in at least two ways (a) MOLLE with Speed Clips or (b) Velcro to a belt up to 2" wide.
After receiving the first unit, I ordered three more because it fit:
o Garmin eTrex Legend HCx GPS
o Canon SD870IS camera
o Nikon 10x25 compact binoculars (needs additional Velcro to close flap)
o Yaesu VX-7R Ham radio (need to figure out what to do with the antenna)
I was going to use the 38CL38AU-GSA Compass/Strobe pouch for the eTrex GPS, but that pouch was to small for the GPS. The Canon SD870IS camera will fit in the Compass/Strobe pouch, but the Compass/Strobe pouch has no padding to protect the camera. The Camera pouch is padded in addition to being larger than the Compass/Strobe pouch.
Pros: Padded for delicate devices; can also mount on belt
This review was written in the old system and had content requirements that are different than reviews written today.