From CASIO VINTAGE, new A100 Series with a unisex design and stylish retro gadget feel.The A100 series is a reproduction of the F-100, CASIO's first resin case model. The design has been updated for this more modern version while retaining the distinctive layout of the F-100's four front buttons along with CASIO vintage metal elements.The bands feature a slide-type clasp that lets you easily adjust the band length without special tools. The A100WE-1AVT comes in a classic stainless steel silver. Features and functions include calendar and stopwatch capabilities, along with everyday wear water resistance and LED light illumination for easy reading in the dark. Specifications Case / bezel material: Resin Adjustable Clasp Stainless Steel Band Resin Glass Water Resistant LED backlight 1/10-second stopwatch Measuring capacity: 59'59.9'' Measuring modes: Elapsed time Daily alarm Hourly time signal Auto-calendar (28 days for February) Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: ±30 seconds per month Approx. battery life: 3 years on CR1616 Size of case : 40.7×32.7×9.2mm Total weight : 53g