A buoyant lanyard for work on and around water. Clip it to a Garmin handheld or inReach communicator and a unit that goes over the side floats where you can retrieve it rather than sinking out of reach.
Worth having on a dive boat, a kayak, a tender or any deck where a device gets handled over open water. Fits inReach series, GPSMAP series, eTrex series, Oregon 200/700/750/750t, Montana 600/610/610t Camo/650t/680/680t, Rino 700/750/750t/755t, Alpha 10/100/200/200 Plus/200i/300/300i, Astro 320/430/900, and other compatible Garmin devices.
