Citizen BY103009A captivates with its advanced EcoDrive radiocontrolled moon phase complication that syncs time to atomic precision and tracks lunar cycles automatically, making this mens watch a techrich standout. Solarpowered quartz movement with perpetual calendar, world time across 24 zones, and powerreserve indicator delivers exceptional accuracy and longlasting performance without battery changes. Sapphire glass and 100 m water resistance add durable versatility, while the classic stainlesssteel case and blue leather strap ensure refined style for everyday and travel wear.