The Entel HT644 is a top-quality marine-band walkie-talkie. The HT644 is IP68 rated and therefore submersible. It provides all "marine band" channels in general use worldwide in the range 156 - 163.275 MHz. Visit us at: https://www.walkie-talkie-radio.co.uk/buying/marine-vhf-walkie-talkie-radios/entel-ht644-marine-vhf-walkie-talkie