คุณสมบัติสินค้า Screen Size 42mm Chip W2 Case material Aluminium Case Band Style Sport Band Display 2x brighter retina display Heart Rate ,ECG No Cellular and GPS GPS SIM Card Not Support water resistant Water resistant 50 m. wireless charging Qi Wireless Charging Battery Life Up to 18 hours Operating System watchOS 5 Color Space Gray Aluminium Case with Black Sport Band Dimensions W x D x H 3.64 x 1.14 x 4.25 cm. Weight 0.032 kg. (Only Case) Warranty 1 Year Option N/A