Engineered to keep surfers in the know, this casio g-shock g-lide men's digital watch is designed for durability and performance. Black square dial with high-definition digital display and stainless steel bezel 46. 0mm blue resin and stainless steel case; mineral crystal features include tide graph, moon data, sunrise/set times for 3,300 locations worldwide, movement tracking, and training function smartphone linking using bluetoothâ® blue bio-based resin strap; buckle clasp water-resistant to 200 meters we are an authorized casio dealer