【Radio Solar】【Surfing & Fishing】CASIO G-SHOCK Watch It's in working order, and the operation has been confirmed. It receives radio waves properly. The backlight also works perfectly. The blue logo on the black body is cool. It has tide graph and moon age functions, so how about it for surfing, fishing, and marine sports? It's radio solar-powered, so it's very convenient and requires little maintenance. There are signs of use, scuffs, and scratches.