Citizen Men's BJ8040-01E Eco-Drive 300 Meter Professional Diver Watch Light powered Eco-Drive Caliber B873 Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 180 days; Low charge warning: 3 day; Quick start ability; Charge time from stop state to max charge: Incandescent Light - 105 hrs, Outdoors, Cloudy (10,000 Lux) - 33 hrs, Outdoors, Sunny (100,000 Lux) - 9 hrs Durable, curved extra-thick (6mm) non-reflective mineral crystal; Case diameter: 48 mm; For mixed-gas diving; Unidirectional rotating time-elasped bezel; Reinforced urethane rubber strap with diving extender Titanium case; Black dial; Date function; Date function at 3 o'clock; Large luminous hands and hour markers for easy readability both in and out of water; Screw-back case and screw-down crown Water resistant to 990 feet (300 M):suitable for scuba diving to a depth of 30 meters for up to 2 hours