The GWM5610 possesses Tough Solar and Multi-band 6 Atomic Timekeeping technology housed within an even slim profile octagonal case. Non-Stop Tough Solar Power provides energy via a small solar panel combined with a large-capacity rechargeable battery that enables a variety of energy-hungry functions to operate smoothly. Black resin band digital watch with neutral face. Features 200-meter water resistance Shock Resistant Tough Solar (Solar powered) Time calibration signal reception Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful) Module: 3495 Size of case: 46.7×43.2×12.7mm Total weight: 52g Mineral Glass Case / bezel material: Resin Resin Band LED Light