The AE-1000W-1A2VEF Casio Collection watch combines a 43.7mm round shaped resin case and black resin strap with a traditional buckle. It has a digital dial which is protected beneath plastic glass. Power is generated by the quartz movement. This model also has a water resistance of up to 100 metres. Accuracy +/- 30 seconds per month Alarm function Automatic calendar Once set, the automatic calendar always displays the correct date. Countdown timer Date and weekday display 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) Mute function The button tones on the mode button can be switched off for discreet operation. Pre-set alarm or timer functions remain active. Resin band Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties. Stopwatch function World time function Displays the current time in major cities and specific areas around the world. - Total Weight 40.0 grams - Case Depth 13.7mm - Case Width 43.7mm - Watch Movement Quartz - Water Resistance 100 metres