Overview Designed for the modern adventurer, this Citizen Eco-Drive watch (Caliber No. J810) combines robust functionality with refined style. Featuring a bold stainless steel case and band, sapphire glass, and 100-meter water resistance, it's built to handle both everyday wear and outdoor activities. Powered by Citizen’s signature Eco-Drive technology, it runs on any light source—eliminating the need for battery replacements—making it a perfect companion for active individuals who value reliability and sustainability. Key Features Dial: Blue Case: Stainless steel, 45.8mm diameter Movement: Eco-Drive (solar-powered), Caliber No. J810, Japan origin Water Resistance: 100 meters Glass: Sapphire crystal for superior scratch resistance Band: Stainless steel Additional Features: Eco-Drive technology (recharged by any light source, no battery replacement required) Date display Insufficient charge warning function Overcharge prevention function Dimensions Case Diameter: 45.8 mm Case Thickness: 10.6 mm