The Citizen Promaster CB5866-55E is a highly functional, eco-friendly timepiece from Citizen's Promaster collection, powered by Eco-Drive technology, which uses light to keep the watch running without the need for battery changes. The watch features a bold black dial, enhanced by contrasting white hour markers and hands for excellent readability. It offers 26 World Cities Time and Global Radio-Controlled synchronization, ensuring precise timekeeping across different time zones. Additional features include a Perpetual Calendar, Insufficient Charge Warning, Overcharge Prevention, and a Power Saving Function to maximize energy efficiency. The Summer Time ON/OFF feature allows for easy daylight saving time adjustments. With a sturdy stainless steel case and cutting-edge functionality, the Promaster CB5866-55E is an ideal choice for travelers and those seeking a stylish, reliable, and low-maintenance timepiece.