Android wear 2.0, gps, 5 bar wr, mil-standard 810 g durability, 0.8 mm thinner than 1st generation, 50m water resistant, interchangeable band included Digital compass, altimeter, barometer, activity tracker, dual layer lcd structure, original watch face, Casio moment setter, microphone, timepiece mode Quartz Movement Case Diameter: 61.7mm Water resistant to 50m (165ft: in general, suitable for short periods of recreational swimming, but not diving or snorkeling