Citizen Watch Promaster Diver Chronograph Eco Drive Mens CA0710-82L. Proof that a dive watch can be fun and functional with the Citizen ISO-compliant Citizen Promaster Chrono 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 stainless steel case and bracelet with blue bezel and matching blue dial, one-way rotating elapsed time, 1/5th second chronograph, 12/24 hour time, date and water resistant to 200 metres.