I bought this for under $4 on eBay from China.
It's too small for my iPhone 6 Plus so find one that fits yours.
I usually use a rubber band or my daughter's hair tie to keep it on.
The great thing is during the summer the air con keeps my phone cool especially when I connect it to the twin dvd rear monitors so kids can watch youtube. Thing gets hot streaming vids.
I direct air above or to the sides if I like also.
There is a knob that sticks out of the bottom but I replaced with a screw from the local hardware store so I can see more of my pioneer screen for the backup camera or music videos ( listening of course).
Just make sure the thing that clamps on your phone is wide enough, I am too lazy to get a new one.