Here are the detailed specifications for the Citizen Promaster Skyhawk A-T Atomic Timekeeping JY8146-54E: Movement: Caliber: U680 Type: Eco-Drive (solar-powered) Jewels: N/A (Eco-Drive movements typically do not use jewels) Frequency: N/A (Eco-Drive movements do not have a traditional frequency) Power Reserve: Approximately 3.5 years (in power save mode) Features: Perpetual calendar, radio-controlled atomic timekeeping, chronograph, split time, world time, UTC display, alarm, world time alarm, daylight savings, countdown timer, dual time, 12/24 hr time Case: Material: Black Super Titanium Diameter: 45 mm Thickness: 14.5 mm Lug Width: 22 mm Case Back: Solid case back Crown: Screw-down crown Dial: Color: Black Markers: Luminous markers Hands: Luminous hands Features: Digital sub-dials, 24-hour (UTC) sub-dial Crystal: Material: Scratch-resistant sapphire crystal with anti-reflective coating Water Resistance: Rating: 200 meters (660 feet) Compliance: Suitable for swimming, showering, and snorkeling Strap: Material: Stainless steel bracelet Clasp: Fold-over clasp with hidden push buttons Additional Features: Design: Bold and powerful design with a black dial and Super Titanium case Day and Date Display: Perpetual calendar, date, and day display Durability: Scratch-resistant sapphire crystal and Super Titanium construction The Citizen Promaster Skyhawk A-T Atomic Timekeeping JY8146-54E is celebrated for its elegant design and reliable performance, making it a great choice for watch enthusiasts