Collection: Apex Case Material: Stainless steel 316L, Black PVD Case Size: 43 mm Strap Material: 3-link black PVD stainless steel 316L, with solid folding buckle Strap Size: 22 mm Hands: Matte white with Super-LumiNova Dial: Matte black with white Super-LumiNova® numbers and markers Crystal: Double domed sapphire crystal with AR coating Movement: Kronaby connected movement BT001, 2 pcs 2- hand-bi-directional micro stepping motors, Bluetooth 4.1 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: 10 bar/ 100 metres