Citizen Eco-Drive Chronograph watch, model number AT0361-81L. Here are its key features: Movement: It uses Citizen's Eco-Drive technology, which is solar-powered and does not require battery changes. Case & Dial: The watch has a 43mm or 44mm stainless steel case, a blue dial, and a stainless steel mesh bracelet. Functions: It features a chronograph with three sub-dials (60-second, 60-minute, and 24-hour), a date display at the 4 o'clock position, and is water-resistant to 100 meters.