45mm Chip S7 Case material Aluminium Case Band Style Sport Band Display Always-On Retina LTPO OLED display Heart Rate ,ECG Yes Cellular and GPS GPS + Cellular SIM Card eSIM water resistant Water resistant 50 m. wireless charging Yes, Faster charge time Battery Life Up to 18 hours Operating System watchOS 8 Color Blue Aluminium Case with Abyss Blue Sport Band Dimensions W x D x H 3.8 x 1.07 x 4.5 cm. Weight 0.038 Kg. (Only Case) Warranty 1 Year Option N/A