Any of Citizen's watches with a 200-meter depth rating could be considered a dive watch, and they come with steel, titanium or rubber bands, steel or titanium cases, quartz movements powered by conventional or solar-powered batteries, and mineral or sapphire crystal. Other features might include, depending on the model, a depth display, depth memory, a rapid ascent alarm, a chronograph, date display, luminous hands, atomic clock synchronization and a radio-controlled perpetual calendar.
One of Citizen's most famous features is its eco-drive technology, which the company pioneered. The face of the watch acts as a solar collector that charges the battery inside, allowing the watch to be powered by light for many years. By preventing the need to open the case, it improves the watch's waterproofing. Citizen's quartz movements are considered to be very accurate, but some models synchronize with an atomic clock through radio signals or continually update through satellite GPS for pinpoint accuracy.
Other features Citizen watches may include are power reserve indicators, light level indicators, daylight savings indicators, world time zones, alarms or dual alarms, countdown timers, backlight displays and perpetual calendars. Sapphire crystals are available with an anti-reflective coating for better visibility. Citizen's titanium watches are made from what the company calls Super Titanium, which is solid titanium with a proprietary coating that resists scratching.