CB5001-57E SKY Caliber No. E660 Power Source: Eco-Drive (light-powered) Accuracy: ±15 seconds/month (when not receiving signals) Power Reserve: Approximately 3 years on full charge (when power save is active) Radio Reception: Japan, USA, Europe, and China radio wave reception Weight: 191g Thickness: 13.7mm Case Size (Width): 45.9mm Case Material: Stainless Steel Case Surface Treatment: Partial plating (jet black color) Band Material/Type: Stainless Steel, Three-fold push-type clasp Band Width: 22.0mm Adjustable Band Size: 115-204mm Glass: Sapphire glass (anti-reflective coating) Water Resistance: 20 bar water resistance Design Features: Luminous (hands + index) Slide rule Functionality: Charge level indicator, Charge warning function, Overcharge prevention function, Power save function Approximately 3 years of operation on full charge (when power save is active) Japan, USA, Europe, and China radio wave reception, Automatic signal station selection function, Regular reception function, Forced reception function Perpetual calendar, Day & date display, 24-hour display, 1/1 second chronograph (60-minute counter), Direct flight, World time function (24 time zones), Daylight saving time function, Alarm New. Comes with a dedicated gift box. Includes warranty card.