"This phone holder that has a 6 point design to securely hold your phone in place and suitable for phones up to 6.7". It clips onto the air vent, can be rotated 360 degrees and doesn't block the charging port on the bottom of your phone." - Clear's description of it from a previous post.
I bought it some time back and bought another one for someone else. Works quite well if you have rectangular car vents. BYD Atto 3 drivers probably won't want this.
These have weak as clamps