Easy-to-use?? works with any smartphone model?? can be used with a case?? or waterproof case. The product makes it easy to take hands free video during almost any activity.</br>The head straps are fully adjustable to fit any sized noggin. No matter what your hat size?? this product will fit.</br>The elastic grippy strap provides a secure hold on your phone so it will stay in place. The patent pending design provides a very strong hold to ensure your device will stay in pl"/br>You don't have to be a PRO to takes hands free video. Try this simple head mount for capturing hands free video with the HD device you already own. It tilts to capture whatever view angle you choose.</br>With Purchase you also receive an Aluminum tightening wrench