Q & Q watch M143J002Y Digital watch Q & Q M143J002Y quartz watch Japanese mechanism Porthole-luminescence alarm chronometer calendar Digital-hour, minute, second 0.24-pm double time Automatically setting the date for the year Waterproof 10 bar / 100 meters - tested at a pressure of 10 bar / 100 meters. Meters value does not correspond to the water pressure at the appropriate depth and air pressure (ISO 2281) 3v battery-lasts 4-5 years Width-54 mm