The chronograph function of the Citizen Eco-Drive BJ2115-07E offers you both timekeeping and stopwatch functions. Not to worry about changing the batteries as this Citizen Depth Meter Chronograph watch is powered by solar energy. A Scratch resistant mineral glass crystal protects this Citizen men's wrist watch from rugged use or accidental drops. A black dial with luminous hands and hour markers add to the class and charm of the Citizen Eco-Drive BJ2115-07E. A black rubber strap gives a complete finish to this Citizen Depth Meter Chronograph watch. Being highly water resistant, this Citizen men's wrist watch survives immersions up to 200 meters deep.