Silver January Birthstone Pendant and Chain June birthstone transflective memory in pixel (MIP)WEIGHT 89 g transflective memory in pixel (MIP)WEIGHT 89 g with silicone band (case only: 61 g)WATER RATING 10 ATMBATTERY LIFE Smartwatch: Up to 28 days 37 days with solar*Battery Saver Watch Mode: Up to 90 days 1+ year with solar*GPS Only: Up to 89 hours 122 hours with solar**All Satellite Systems: Up to 63 hours 77 hours with solar*All Satellite Systems and Multi band: Up to 36 hours 41 hours with solar**All Satellite Systems and Music: Up to 16 hoursMax Battery GPS: Up to 213 hours 578 hours with solar**Expedition GPS: Up to 62 days 139 days with solar**Solar charging Ref 2298ZI Free engraving on this product Made from polished sterling silver