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 modern classic design timepiece features a silver tone stainless steel case with black leather strap and 40mm case, metallic silver colour dial and day/date function. Ref: AW1231-07A Product Information Brand: Citizen Movement: Eco-Drive Case Material: Silver Tone Stainless Steel Case Size: 40mm Type of Strap: Black Leather Strap and Buckle Glass Material: Sapphire Crystal Dial: Metallic Silver Gender: Mens