Dive into the world of technology with this trendy timepiece from Casio's Vintage collection, suitable for both men and women. The A100 series honors the F - 100, Casio's groundbreaking watch with a resin case. It keeps the classic layout with four front buttons and adds vintage - style metal elements for a contemporary look. These watches look retro but are packed with modern features. They come with a stopwatch, calendar, and water resistance, making them perfect for daily use. An LED light guarantees clear viewing in any lighting. You can easily adjust the band length with the slide clasp for a great fit every time. - 40.7 × 32.7 × 9.2mm Case Size - 53g Weight - Resin/Chrome plated Case and Bezel - Stainless Steel Band - Adjustable Clasp - Water Resistant - Approx. battery life: 3 years on CR1616 - Resin Glass - Stopwatch - Alarm/hourly time signal - Daily alarm - Calendar: Auto - calendar (28 days for February) - Accuracy: ±30 seconds per month - Regular timekeeping: Hour, minute, second, pm, month, date, day

Using this Casio watch is a breeze. To start the stopwatch, just press the relevant button on the front. For setting the alarm, check the instruction manual to input the right time. The LED light can be activated when you need better visibility in the dark. When it comes to adjusting the band, use the slide clasp to find the most comfortable fit. As for maintenance, since it's water - resistant, you can wear it in light rain or when washing your hands, but avoid submerging it in deep water. The battery should last about 3 years, but when it starts to run out, replace it with a CR1616 battery. Keep it away from extreme temperatures and strong magnetic fields to ensure its accuracy and longevity.