Time to unplug. The Eco-Drive Proximity requires zero wires, plugs for charging. Powered by light, the Eco-Drive Proximity, is a smarter watch for the tech-savvy consumer with bluetooth compatiblity to iOS and Android. The Eco-Drive Proximity features a perpetual calendar chronograph, dual time, alarm, power reserve, light level indicator, time and date sync. Additional capabilities include phone search/filter and visual/vibration alerts. This model appears in a black ion-plated stainless steel case and bracelet, black dial and bright blue details. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number W770.