Citizen’s simple yet revolutionary Eco-Drive technology harnesses the power of light, whether natural or artificial, and converts it into energy, storing the surplus in a power cell. Designed to charge from any form of light source, from sunlight to desk lamps, you can go about your daily life and be confident that your Eco-Drive won’t stop. This Citizen Chandler mens watch is sporty and stylish. With a stainless steel bracelet and 42mm case, key features to this retrograde perpetual calendar include month-day-date, alarm, dual time, 12/24 hour time and a non-reflective crystal. 100m water resistant. Ref: BL8120.52E Product InformationBrand: Citizen Eco-Drive Caliber 8700sCase Material: Stainless SteelCase Size: 42mmType of Strap: Stainless Steel Glass Material: Sapphire CrystalDial: BlackWater Resistant: 100mGender: Mens