Collection: Diver Case Material: Stainless steel 316L Case Size: 45.7 mm Strap Material: Stainless steel 316L, with butterfly buckle Strap Size: 21.8 mm Hands: Matte white luminescent Dial: Brushed blue with applied luminescent indexes Crystal: Sapphire crystal Movement: Kronaby connected movement BT003, two sub dials. Bluetooth 5.0 Low Energy (BLE), vibration motor, accelerometer Battery: Battery Life up to 2 years (depending on use), CR3032 coin cell APP: Kronaby App working with (or later version) Android 5.0 and iOS 9 Water Resistant: 20 bar/ 200 metres