The new Calibre 2100 is Citizen's most advanced chronograph, the only Eco-Drive chronograph with an instantaeous reset button that instantly returns all the chronograph registers to zero Full chronograph function includes a 1 hour subdial for the minutes and a 12 hour subdial, along with a center sweep 1/5 second hand Independent second hand subdial at the 6 o'clock Charges in Sunlight or Indoors - No Batteries to Change - Ever! When Fully Charged has a 240 Day Power Reserve Date display at the 4 o'clock position Alarm function provided by red center hand and is easily set with a separate button at the 8 o'clock position Push-Button Triple Folding Buckle with Safety Fold-over Power reserve dial at the 12 o'clock position Screw-Back Case and Screw-down crown Non-reflective scratch-resistant mineral crystal Solid Stainless Steel Case & Bracelet 200 Meters Water-Resistant Approximate dimensions: 44 mm (nearly 1 3/4 inches) wide not including setting crown and 15 mm thick