With Citizen Eco-Drive technology, this watch never needs a battery. Harnessing and converting the power of natural or artificial light to energy, the watch then stores it in a permantly rechargable lithium-ion cell. Look stylish and never have to worry about battery life again. 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 which is stored in a permanently rechargeable lithium-ion cell. It recharges continuously in any kind of light to run forever. Watch features: Scratch resistant glass. Black dial. Easy to read dial. Stone set stainless steel case. Black stainless steel bracelet. Deployment clasp. Eco-Drive movement. Water resistant to 100m. Analogue display.