Gorgeous Coil Wire Work Around Blue Chalcedony Pear Shape 925 Sterling Solid Silver Pendant R101786 15 Alpine Eagle battery operating time: 7 months battery operating time: 7 months on rechargeable battery (operation period with normal use without exposure to light after charge) 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy Accuracy: ±15 seconds per month (with no mobile link function) Other features Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents 55 mm Case diameter 30 mm Case Steel Dial colour Lavender Crystal Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides Water resistance 15 bar (150 metres 500 feet) Total product weight (approx Pendant crafted in 925 Sterling Silver set with Blue Chalcedony