Case size (H× W× D): 51,3 mm x 48,9 mm x 16,6 mm Weight: 61 g Case / bezel material: Resin (The resin housing is the ideal everyday companion. It is durable, lightweight and relatively insensitive to cold, heat or other external influences) Band: Resin (The synthetic band is equipped with a buckle) Water resistance: 200-meter water resistance (Perfect for free diving without scuba gear: the watch is water resistant up to 20 bar according to ISO 22810) Mineral glass Power supply and battery life: 2 years Bluetooth Smart: The watch is equipped with energy-saving Bluetooth® technology, which offers power-saving data transfer at the push of a button. The watch can connect to a smartphone wirelessly via Bluetooth®, enabling access to a wide range of useful functions Smartphone: Local time will automatically be adjusted whenever the watch is connected with a smartphone. Incoming calls display Super-Auto LED Light: If the ambient light fades, a turn of your wrist illuminates the watch display