◆Drive system: Solar radio correction ◆Drive period: [Full charge] approximately 9 months, [Power save] approximately 2 years ◆ Waterproofing: Reinforced waterproofing for everyday use (10 atmospheric pressure) ◆Nightlight: Needles, Indexes ◆ One type of magnetism resistance ◆ Overcharge prevention function ◆ Instant start function ◆Power saving function ◆ Full auto calendar function (until December 31, 2099) ◆ Radio correction function (receive standard radio waves from Japan, China, the United States, Germany, and the United Kingdom) ◆Automatic reception function ◆Forced reception function ◆Receive result display function ◆ Time difference correction function ◆ Bando Just: Wave pin system spec ■ Specifications ■ Colors: dial/green, case/band/silver Accuracy: Average monthly difference ±15 seconds (non-receive) Case: Stainless Steel Edge: Stainless Steel Back lid: Stainless steel (full metal case) Glass: Sapphire glass (super clear coating) bands:metal Bandwidth: 20.0 mm (20.0 mm) Mid-stay: One-push three-fold system Case Size: 46.1 x 39.5 mm (H x W) Thickness: 9.5mm Weight: 115g