digital smartwatches with sleep tracking and fitness monitoring-Citizen Eco-Drive Multi-Function Men's Watch - AP4000-07W

 This Eco-Drive watch from Citizen starts with a simple, yet revolutionary concept - a watch that never needs a battery! Its Eco-Drive technology harnesses the power of light from any natural or artificial light source and converts it into energy. Wear this watch with smart casuals to exude an amazing sense of style and unmistakable attitude.