Whether it's day or night, you can trust these durable, Digital Chronograph Nylon Straps to keep you and your workout on track. 40MM Resin Case Nylon Strap with Velcro Closure Features include time, seconds, day/date, chronograph with lap time, alarm, second time zone, 12/24 hour time and backlight functions LCD Display Water Resistant to 330 Feet Download Manual