The Citizen Promaster Nighthawk BJ7135-02E is a great choice for travelers and adventurers. You can wear it when flying across time zones or diving in the water. With its 42.5mm case size, it's not too big or too small. The watch is powered by solar energy, so you don't have to worry about changing batteries often. The dual - time feature helps you easily manage different time zones, making it perfect for people who are always on the move.