CITIZEN¨'s PROMASTER 1000M Professional Diver gives divers a reason to go deeper than ever before! This ISO compliant timepiece, built with diving in mind, is tough and durable. The case and bezel are crafted in Super Titaniumª and feature accents of diamond-like carbon (DLC) + MRK coatings for added toughness. This timepiece additionally features a helium release valve, a power reserve indicator, a one-way rotating elapsed-time bezel with lock, a wetsuit strap extender, a screw-back case and screw-down crown, and an anti-reflective sapphire crystal. Water resistant up to 1000 metres.