Movement features: 3 hands/calendar 28,800 times per hour (3Hz) frequency stop-second device one-way automatic winding 36 hours of energy storage. Case technology: brushed sand Polished case back material: 316L stainless steel Bottom cover type: screw-in bottom cover Strap material: stainless steel Mirror coating: anti-glare blue coating Head type: screw-in lock Baffle function: 120 teeth one-way rotation Luminous bezel: 240,000 / KG Swiss BGW9 super luminous powder green light Surface color: green silver Surface luminescence: 240,000 / KG Swiss C3 super luminous powder blue Pointer craft: steel color applique needle super bright Luminous pointer: 240,000 / KG Swiss C3 super luminous powder blue and green light Hand size: 8 * 12 * 12mm (hour hand * minute hand * second hand length) Waterproof rating: 100 meters waterproof / diving [can wash hands swim meet all daily waterproof purposes] Exhaust valve: none Warranty period: two years free warranty Packaging standard: professional waterproof plastic box packaging