Collection: Sekel Case Material: Stainless steel 316L Case Size: 38 mm Strap Material: 18 mm brown with blue lining Italian vegetal tanned leather strap, stainless steel buckle Strap Size: 18 mm Hands: Blue and Rose gold tone plated with Super Luminova Dial: Silver dial with circular brushing and rose gold applied indexes 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), button cell battery CR3032 coin cell APP: Kronaby App working with (or later version) Android 5.0 and iOS 9 Water Resistant: 10 bar/ 100 metres