UM725 Fixed Mount VHF with GPS Bluetooth - BlackFull-Featured VHF Marine Radio with GPS Receiver Built-in. Private Text Messaging Send messages over Marine Channels to other capable radios.The UM725GBT is the first marine radio to offer Bluetooth wireless text messaging using your smartphone to text with a similarly capable marine VHF radio. You and your crew will enjoy the privacy of texting boat-to-boat, rather than broadcasting over your radio for all the boats in your area to hear. No more