Easy to install: No need for other tools, just attach the two extendable grip arm clips to the center rear-view mirror, phone holder arms expand up to a total of 3.5 inches wide. Designed with a sturdy lock knob that locks the neck of the mount and can be adjusted to any 270-degree angle.360° Half Spherical Swivel can keep your cell phone on horizontally or vertically. Slim, lightweight, and compact, the mount conveniently hang from the rearview mirror keeping the dashboard, windshield, and cup holder slot cleared.