Perpetual Chronograph A-T CollectionCitizen Eco-Drive with atomic timekeeping, the Perpetual Chrono A-T. Atomic clock synchronization for superior accuracy in 5 time zones, this perpetual calendar chronograph with alarm also features an anti-reflective sapphire crystal and brown ion plated bezel. Synchronized to Atomic Clock for Superior AccuracyAtomic Timekeeping Technology with Synchronized Time Adjustment Available in 5 Time Zones (British, Eastern, Central, Mountain and Pacific) 1-Second Chronograph Measures up to 60 MinutesPerpetual Calendar12/24-Hour TimeAlarm Power Reserve IndicatorAnti-Reflective Sapphire CrystalDay/DateMovement: Caliber E650Diagram of FeaturesCollection Variations