Review on Side Mount Phone or Tablet Holder: Transform Your Laptop or Computer Monitor - iPad as Extra Display for MacBook - Portable Dual Screen Setup - No Clamp, Clip or Intrusive Design by Justin Bishop

I used to have a magnetic tablet holder. Metal stickers are still on the laptop and tablet. Didn't fit my tablet. It was rubbish. However, two of them keep my 15.7 inch USB3.0 portable monitor sweat free. This is one of those ultra-thin, lightweight monitors that's no bigger/thicker/heavier than a laptop screen. up the screen of a laptop with an attached monitor, albeit not at angles beyond nearly straight up and down. But hey, it's the Macbook's fault, this product holds the monitor tight enough that I can grab the laptop by the monitor and shake it a bit. Don't move those strong magnets. These things hold up for sure. Insanely strong magnets, especially compared to the junk I've gotten before and never used. I like this best for a portable monitor when working at home in bed or on the couch. It will be convenient to use it on the table in the hotel room. Pretty solid product. For big things you need two, one probably fits in the phone. A tablet or portable monitor definitely needs two. They work fine. Recommended.