Collection: Sekel Case Material: Stainless steel 316L Case Size: 43 mm Strap Material: Brown with blue lining, Italian vegetal tanned leather strap, stainless steel buckle Strap Size: 22 mm Hands: Metal plated with Super LumiNova® Dial: Sunray brushed sterling silver plated with applied indexes, Super-LumiNova® 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