Railblaza Mobi Device Holder StarPort Kit AdjustableExtra safe mounting for your phone, GPS, VHF, EPIRB or other mobile device Attach it to any vessel or vehicle on water or land basically any place you can install a RAILBLAZA StarPort, RIBPort or RailMount Spring loaded arms are sufficient for most applications, with neoprene rubber pads to give high gripping power Adjustable, UV stabilised, Eurethane rubber retaining strap ensures your device goes nowhere, even in the most rugged environment