Like a mechanical third hand, this Mobile Device Holder, or ‘Mobi’ for short, securely holds your phone, GPS, VHF, EPIRB or other handheld mobile device anywhere you have installed a RAILBLAZA StarPort®, RibPort or RailMount. Spring-loaded arms with protective rubber grip pads adapt to a wide range of handheld equipment designs. Locking retaining strap combines minimal obstruction of device controls with convenient one-handed thumb release for fast access to the device itself. The adjustable Mobi can be fitted into a StarPort®, RibPort or RailMount in almost any position, even mounted overhead. StarPort® mounts sold separately.