Review on 📱 HLOMOM Sports Wristband Phone Holder for iPhone 12/12 Pro Max/XR/11/X/8 Plus/8/7/6 Plus, Detachable Running Phone Holder for Cell Phones 4''-6.5'', 360° Rotatable with Key Holder by Tanya Barker

The product is advertised dishonestly. In the video you can see him holding the phone without moving from side to side, but they only move him so he doesn't shake much. Thing is, it shakes everywhere, not to mention the rubber straps cover or partially cover the camera lenses no matter how you try to adjust them. I'd say this would only be useful for a small, lightweight phone without a protective case, and even then the camera lens would be at least partially obscured. In other words: completely useless for most people.