Citizen Eco-Drive is fueled by light, it never needs a battery. Eco-Drive it's unstoppable. Eco-drive technology harnesses the power of light from any light source. Both natural and artificial light are absorbed through the crystal and the dial, than a special solar cell converts light and stores it as energy. The cell recharges continuously in any kind of light. It runs for at least two months even in the dark.
The Depth Meter Chronograph is ISO certified, is all stainless steel with black ion plating, has a 60-day power reserve, with a two day advanced low charge indicator and is accurate within +/- 15 seconds per month. Watch is equipped with luminescent hands and markers with blue ascent. Watch charges in both sunlight and indoors. The watch can tell you the correct depth to 125', has a maximum depth memory that is handy for logging your dives, and a one directionalrotating elapsed-time bezel for safety.
The Eco-Drive is equipped with a 50-minute chronograph, 12-24 hour time formats with date. A non-reflective crystal, water resistant to 660' (200 Meters), a screw-in back case and screw-down crown along with a rubber wrist strap, and it never needs a battery! All this making the Depth Meter one sought after timepiece. Watch purchase includes the five year US warranty.
The Depth Meter Eco-Drive is an analog solar powered diver's timepiece which hasan electronic depth meter and chronograph function built in. The solar power generation function transforms solar energy into electrical energy to run the watch. Since solar energy is used as the power source of this watch, it has no need of regular replacement of the battery unlike the general diver's watches using the mercury cell, etc. The built-in depth meter function automatically measures the depth in diving with the watch worn on the wrist. The maximum depthin diving is automatically memorized. The chronograph function measures the timein units of one second for 50 minutes.
Fully charging the watch with an overhead office light is usually insufficient, to achieve a full charge from a completely depleted power reserve, however, office light is sufficient for keeping the watch continually charged. It is recommended to use natural outdoor light, or recharge indoors with an incandescent (3,000 Lux) bulb 20" away from the watch in 18 hours, outdoors, cloudy (10,000 Lux) 5 hours and outdoors, sunny (100,000 Lux) in 2.5 hours.