Waterproof Radio For Water Sport

I saw many water sport and activities in this island. People are coming here to enjoy the hot weather. That's why most tourists that I saw in this place normally came from the cold weather countries. European tourists are the most tourists that I saw in Phuket island, Thailand. Although I also see some other Asian tourists such as Japaneses, Chinese, and other Asian tourists, the amount of them are not comparable with European tourists here.

Few days ago, when we spent our time on the beaches, I saw few tourists came back from their water sports activities. They were using special waterproof radio when they went on board. It is interesting to see it. I never see something like that before. That's why I asked some questions to my husband regarding that radio.