Silver-tone dive watch featuring black tachymeter topring and round guilloche dial with three chronograph subdials 42 mm titanium case with antireflective sapphire dial window Japanese quartz movement with analog display , Before using the watch -Check the charge level of the watch,Select the city for which you want to indicate the time and date,Check the result of the radio signal reception Titanium link bracelet featuring fold-over clasp with hidden double push-button closure Features automatic timekeeping for perfect accuracy, one-second chronograph measures up to 60 minutes, perpetual calendar, radio-controlled five time zones, alarm, 12/24 hour time, and power reserve indicator Water resistant to 200 m (660 ft): In general, suitable for professional marine activity and serious surface water sports, but not scuba diving. Kindly refer the link card provided along with the product for information on the manufacture's user manual location Please refer part image for instruction and troubleshooting tips