Collection: Carat Case Material: Stainless steel 316L Case Size: 38 mm Strap Material: Beige Italian vegetal tanned leather strap. Stainless steel buckle Strap Size: 18 mm Hands: Rose Gold tone Dial: Sterling silver plated, blasted finish with printed numerals Crystal: Double domed sapphire crystal with AR coating Movement: Kronaby connected movement BT002, 2-handbi-directional micro stepping motor, 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