Value indicates how many multiple alarms are available. The hourly time signal causes the watch to beep every hour. automatic calendar. Once set, the automatic calendar always shows the correct date. 12/24 hour timekeeping. Hours are displayed in either 12 or 24 hour format. Acrylic glass. Acrylic is easy and relatively unbreakable. resin box. The resin box is the ideal companion for every day. It is durable, lightweight, and relatively insensitive to cold, heat, or other external influences. resin strap. The strap contains synthetic resin, an ideal material for this component due to its extreme strength and flexibility. Buckle. The bracelet is equipped with a buckle. 3 years - 1 battery. The battery supplies the watch with the necessary energy for approx. 3 years. Water resistance classification (WR) according to ISO 22810. This model is waterproof according to DIN 8310 or ISO 22810 and withstands small splashes of water. Any further contact with water should be avoided. Dimensions (WxHxD). 38. 9mm x 35mm x 9. 4mm. Weight. approx. 24g.