Go retro in all black with a gunmetal case and black ion-plated mesh band for the essence of monochromatic minimalism in a bold, boxy look. The mesh band and black ion plating elevates and refines this watch, inviting you to make it your favorite accessory. More than just a fashion statement, this watch delivers practical functions such as stopwatch and alarm, as well as water resistance for daily use to free you from worry, even on rainy days.Go retro in all black with a gunmetal case and black ion-plated mesh band for the essence of monochromatic minimalism in a bold, boxy look. The mesh band and black ion plating elevates and refines this watch, inviting you to make it your favorite accessory. More than just a fashion statement, this watch delivers practical functions such as stopwatch and alarm, as well as water resistance for daily use to free you from worry, even on rainy days. Case size (L× W× H) : 38.6 × 36.3 × 9.6 mm Weight : 55 g Case and bezel material Case / bezel material: Resin / Black chrome plated Band Adjustable Clasp Stainless Steel Mesh Band Water resistance Water Resistant Power supply and battery life Approx. battery life: 7 years on CR2016 Exterior Glass Resin Glass Surface treatment Black ion plated band Stopwatch 1/100-second stopwatch Measuring capacity: 59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times Alarm/hourly time signal Daily alarm Hourly time signal Light Electro-luminescent backlight Light color EL:Blue Green Calendar Auto-calendar (28 days for February) Accuracy: ±30 seconds per month Other features 12/24-hour format Regular timekeeping: Digital: Hour, minute, second, pm, date, day