Arkon's durable HMHD6AMPS car headrest mount is ideal for mounting an AMPS-compatible device in the center of the back seat for use in taxis and other passenger vehicles. The multi-angle aluminum mount measures 9 inches end-to-end and attaches to straight bar headrest posts on either the front or back seats. Three adjustment knobs at 2.5 inch intervals on the mount arm and two additional 180° adjustment points at the top and bottom of the mount help position the device for perfect viewing. It is compatible with Arkon's Slim-Grip Universal Tablet Holder (TAB001-AMPS), as well as other device holders having a 4-Hole AMPS pattern (sold separately). This mount also works with AMPS-compatible vehicle-specific mounts (VSMs), cameras, GPS devices, audio/video receivers, or satellite radios including Sirius S50, Sirius XM Onyx Plus, XM Onyx EZ, Sirius XM Lynx, Stratus 7, Dock & Play, and Sirius Dock & Play (sold separately).