It is a WatchOS smartwatch with dual-core processor 1Ghz that performs well the functions of the Apple Watch 3. With a SIM card slot, the Apple Watch 3 allows you to download up to 150 Mbps for Internet browsing, but it also depends on the carrier. Great connectivity of this device that includes Bluetooth 4.2 + A2DP, WiFi 802.11 b/g/n (2.4Ghz) and NFC for payments by approach or connection to other devices. Device with 42 grams including battery. The Apple Watch 3 smartwatch is relatively thin.