Make a splash with this ISO-certified watch from the Citizen Eco-Drive Promaster Diver Collection. It is fueled by light and never needs a battery, so you'll never need to open your caseback or compromise your dive again. One-way rotating elapsed-time bezel, screw-back case and screw-down crown and non-reflective crystal with poly strap. Featuring our Eco-Drive technology powered by light, any light. Never needs a battery. Product details: Movement: Eco-Drive Band: Polyurethane Case Size (mm): 48 Crystal: Anti- Reflective Mineral Crystal Water resistance: 3 bar Additional functions: 3 Hand, Date Warranty: 5 years Limited Manufacturer Warranty