Samsung's first watch on Wear OS Powered by Samsung (co-developed with Google) with a slimmer flat case and touch-sensitive digital bezel replacing the physical rotating ring — the thinner case and BioActive sensor stack make battery and back-cover repair a tighter job than on Watch3.
| Display | 1.2"/1.4" Super AMOLED |
| Chip | Exynos W920 |
| Case | 40mm/44mm, digital touch bezel |
| Glass | Corning Gorilla Glass DX+ |
| Sensor | BioActive Sensor (heart rate, ECG, BIA) |
| Connectivity | Bluetooth/Wi-Fi only |