The GMA-S2100 series downsizes the GA-2100 watch to create a simple and slim design. It combines a 43mm octagonal shaped white resin case and strap with a traditional buckle. Its white 3D dual display dial has a simple to read digital display, Neobrite coated hands, and a day of the week sub-dial, all of which is protected beneath mineral crystal glass. Power is generated by the quartz movement. This model also has a water resistance of up to 200 metres. Accuracy +/- 15 seconds per month Alarm function Automatic calendar Once set, the automatic calendar always displays the correct date. Core guard structure Four stainless steel pipes form a metal frame that joins the bezel securely with the case back for increased shock resistance Countdown timer Display illumination Auto Light: The watch dial will illuminate automatically when you tilt your wrist towards you. Once activated, this feature will automatically deactivate after six hours. LED light selectable illumination duration (1.5 seconds or 3 seconds) Neobrite A luminous coating on the watch hands provides illumination in the dark. Resin band & case Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties. Shock-resistant Shock-resistant construction protects against impact and vibration. Stopwatch function World time function Displays the current time in major cities and specific areas around the world. - Total Weight 41g - Case Depth 42.8mm - Case Width 11.2mm - Watch Movement Quartz - Water Resistance 200 metres