It starts with a simple, yet revolutionary concept: a watch that never needs a battery. Citizen Eco-Drive technology harnesses the power of light-from any natural or artificial light source-and converts it into energy. Inventing a technology to ensure watch that never stops anywhere in the world was one of the challenges for CITIZEN.
In 1976, CITIZEN invented the world’s first light-powered analogue quartz watch that runs using only light as a power source. This technology, now known as “Eco-Drive,” can generate power from any light source, artificial, natural and even dim light to keep watches running without 
ever replacing batteries. As a pioneer of the field, CITIZEN set new challenges for themselves to bring forth the full potential of power generation using light.
CITIZEN’s Eco-Drive technology has won acclaim in Japan and other countries for its contribution to environmental protection. In 1996, an Eco-Drive watch was nominated as the first watch to qualify for the Eco Mark, a label managed by the Japan Environment Association (JEA). In 2014, CITIZEN became the first watchmaker to earn a Gold Prize in the JEA’s Eco Mark Awards.
Citizen Eco-Drive Titanium Sapphire Crystal 100M BM7170-53L Men’s Watch have case and band with push button deployment. The Blue dial with luminous hands and hour markers gives an amazing look to the watch. The features add another factor i.e. Date display. The watch have Precise Eco-Drive E111 movement, powered by any available light. The watch have Scratch resistant sapphire crystal with Water resistant to 100m. Case measures 43mm diameter by 12mm thick.
An absolutely incredible item to wear for it brings out the look of class and elegance.