Proof that a dive watch can be fun & functional with the Citizen ISO-compliant Citizen Promaster Diver. With Eco-Drive technology, it is powered by light and never needs a battery, so you'll never need to open your caseback or compromise your dive again. This timepiece features a sapphire crystal glass with super titanium case, black polyurethane strap with black dial, dual time display, 12/24-hour time, date and divers 200M. Caliber number B877.