Bluetooth Version
Bluetooth v5.0
Size (Main Display)
1.4"
ROM Size (GB)
16
Specifications Detail
Network/Bearer
Infra
Bluetooth, Wi-Fi
Connectivity
Location Technology
GPS,Glonass,Beidou,Galileo
Wi-Fi
802.11 a/b/g/n 2.4+5GHz
NFC
Yes
Bluetooth Version
Bluetooth v5.0
Bluetooth Profiles
A2DP,AVRCP,HFP,HSP
OS
Wear OS Powered by Samsung
Display
Technology (Main Display)
Super AMOLED
Size (Main Display)
1.4" (34.6mm)
Resolution (Main Display)
450 x 450
Color Depth (Main Display)
16M
Processor
CPU Speed
1.18GHz? 
CPU Type
Dual-Core
General Information
Color
Silver
Dimension (HxWxD)
45.5 x 45.5 x 11.0 mm
Weight
52.0 g

Battery
361mAh247mAh
*Typical value tested under Samsung laboratory condition. Typical value is the estimated average value considering the deviation in battery capacity among the battery samples tested under IEC 61960 standard. Rated(minimum) capacity is 361mAh for Galaxy Watch4 Classic 46mm, 247mAh for Galaxy Watch4 Classic 42mm. Actual battery life may vary depending on network environment, usage patterns, and other factors.
*Battery time is based on our own laboratory measurements, and may vary depending on factors such as device settings, usage patterns and operating conditions.
AP
Exynos W920 Dual Core 1.18GHz
OS
Wear OS Powered by Samsung
Memory
1.5GB RAM + 16GB Internal Memory*Actual storage available may vary depending on pre-installed software. RAM capacity may vary depending on model, color, and country.
Connectivity:
LTE, Bluetooth?® 5.0,? Wi-Fi 802.11 a/b/g/n 2.4+5GHz,
NFC, A-GPS/GLONASS/Beidou/Galileo*Beidou may not be available in certain regions.
*LTE connectivity only available in LTE models.
Sensor
Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor, Optical Heart Rate Sensor,
Electrical heart sensor, Bioelectrical Impedance Analysis Sensor
Durability
5ATM+IP68/MIL-STD-810G
Compatibility
Compatible with Android 6.0 or higher, RAM 1.5GB above*Device activation is only available after connecting to a smartphone that supports Google Mobile Services(GMS).
*Please refer to your device manufacturer to find out whether your smartphone supports Google Mobile Services(GMS).
*Compatible smartphones and available features may vary by region, carrier and device.