Enhance your look by wearing a men's Citizen Promaster Eco-Drive Sky Wristwatch. The Citizen Eco-Drive features an aviation circular slide rule, a current date and time zone display, and magnetic interference resistance and chronograph systems. The Eco-Drive wristwatch is also water resistant and comes with shock detection, automatic hand correction, an alarm, and perpetual calendar and time details with an analog display for up to 26 cities around the world. The Citizen Eco-Drive is powered by a solar charging system with solar quartz batteries that can last up to 8 months on a full charge with regular use. The watch even includes a low charge warning to let you know when it needs to be recharged, as well as an overcharge protection feature, and a power saving mode.