Samsung Galaxy Watch4 40mm Black (R860 BT)

• Device type: smartwatch for everyday use, fitness, and health tracking.
• Display: 1.2″ Super AMOLED with Always-On Display, protected by Gorilla Glass DX.
• Resolution: 396×396 pixels, bright and sharp visuals.
• Body: aluminum, water and dust resistant (IP68 + 5ATM), MIL-STD-810G certified.
• Connectivity: Bluetooth 5.0, Wi-Fi, NFC (Samsung Pay), GPS/GLONASS.
• Sensors: heart rate, ECG, SpO₂, body composition, accelerometer, barometer, gyroscope.
• Battery: up to 40 hours of use, wireless charging supported.
• OS and chip: Wear OS with One UI Watch, Exynos W920 processor.
• Differences from Galaxy Watch4 Classic: the Watch4 is lighter and more compact due to the absence of the physical rotating bezel, but offers the same features and sensors.
• Differences from Galaxy Watch3: updated OS (Wear OS instead of Tizen), newer Exynos W920 chip (vs. Exynos 9110), added body composition sensor, and deeper integration with Google services.