I'm surprised I've never seen this before. The holder for your smartphone is integrated in the handle. I think that's a brilliant idea. I've tried the mount with two smartphones, one 2.125" wide and the other 3.25" and they both fit with no issues. The slide adjustment doesn't grip as well as some phone holders I've used, but it can be an advantage as it's not a hassle to set up the phone. I think this will be enough for normal use (no running, jumping, rolling down hills, etc.). The phoneβ¦