I was really looking forward to this cell phone mount, until I used it. There's not much to it. What you don't see is that on the backside of the item, there's a small sticky area. Basically two-sided tape. You peel off the cover and just stick it to the surface you want it on.
So, be aware you're applying tape and adhesive to your dash, car, etc. If you have a vehicle you care about, that's something to consider.
But, in my case it did not matter. I cleaned the surface, dried it, and then applied the adhesive socket mount.... it was awesome for about 15 seconds. Then it totally gave up and fell off. After that, it would not stick any more and just became useless literally after about 15 seconds of use.
It can NOT hold the weight of a Galaxy S9+ with an Otterbox Commuter case on it. At all. Esp if you place / remove the phone from the mount with any regularity. Will be looking into replacement or refund, for sure.