PASOY Men's Big Military 50M Waterproof Rubber Band Analog Digital Chronograph Alarm Sport Quartz Watches Dual-display sport watch featuring day/date, 1/100 chronograph,alarm,calendar,backlight and 50M Water Resistant German black tire pattern rubber strap,highly elastic PU case,it makes watch durable,comfortable and shockproof.military style outlook light and 50M Water Resistant Japanese movement and battery lasts 2-3 years Back light function lasts 3 seconds,easy to read at dark Water resistant to 164 feet (50M),suitable for snorkeling, as well as swimming, not diving