Brand‎SamsungManufacturer‎Samsung, Samsung Electronics VIETNAM Co., Ltd., Yen Phong Industrial Park, Yen Trung Commune, Yen Phong District, Bac Ninh Province, VIETNAMSeries‎Samsung Galaxy Watch4Colour‎BlackItem Height‎43 MillimetersItem Width‎44 MillimetersStanding screen display size‎4.4 CentimetresProduct Dimensions‎1 x 4.4 x 4.3 cm; 30 GramsBatteries‎1 LR41 batteries required. (included)Item model number‎SM-R870NZKAINUConnectivity Type‎BluetoothWireless Type‎BluetoothWattage‎220 WattsOperating System‎Wear OsAverage Battery Life (in hours)‎40 HoursAre Batteries Included‎YesLithium Battery Energy Content‎1.35 Watt HoursNumber of Lithium Ion Cells‎1Included Components‎‎Galaxy Watch::Watch strap::Wireless charger::Quick start quideManufacturer‎SamsungItem Weight‎30 g