Model NameSamsung Galaxy Watch4
Dimensions (Aluminum, 44mm)44.4 x 43.3 x 9.8 mm (1.75 x 1.70 x 0.39 in)
Dimensions (Aluminum, 40mm)40.4 x 39.3 x 9.8 mm (1.59 x 1.55 x 0.39 in)
Dimensions (Classic, 46mm)41.5 x 41.5 x 11.2 mm (1.63 x 1.63 x 0.44 in)
Dimensions (Classic, 42mm)41.5 x 41.5 x 11.2 mm (1.63 x 1.63 x 0.44 in)
Weight (Aluminum, 44mm)30.3 g (1.06 oz)
Weight (Aluminum, 40mm)25.9 g (0.92 oz)
Weight (Classic, 46mm)52 g (1.83 oz)
Weight (Classic, 42mm)46.5 g (1.62 oz)
Build (Aluminum)Glass front (Gorilla Glass DX+), aluminum frame
SIM (Aluminum)No SIM or eSIM
MIL-STD-810G compliant*
Compatible with standard 20mm straps
ECG certified
Blood pressure monitor *does not guarantee ruggedness or use in extreme conditions
MIL-STD-810G compliant*
Compatible with standard 20mm straps
ECG certified
Blood pressure monitor *does not guarantee ruggedness or use in extreme conditions
SIM (Classic)eSIM
MIL-STD-810G compliant*
Compatible with standard 20mm straps
ECG certified
Blood pressure monitor
Rotating bezel *does not guarantee ruggedness or use in extreme conditions
MIL-STD-810G compliant*
Compatible with standard 20mm straps
ECG certified
Blood pressure monitor
Rotating bezel *does not guarantee ruggedness or use in extreme conditions
Display TypeSuper AMOLED
Display Size (Aluminum, 44mm)1.4 inches
Display Size (Aluminum, 40mm)1.2 inches
Display Size (Classic, 46mm)1.4 inches
Display Size (Classic, 42mm)1.2 inches
Resolution (Aluminum, 44mm)450 x 450 pixels (~321 ppi density)
Resolution (Aluminum, 40mm)396 x 396 pixels (~330 ppi density)
Resolution (Classic, 46mm)396 x 396 pixels (~330 ppi density)
Resolution (Classic, 42mm)396 x 396 pixels (~330 ppi density)
Protection (Aluminum)Corning Gorilla Glass DX+
Always-on display
Always-on display
Protection (Classic)Corning Gorilla Glass DX
Always-on display
Always-on display
ChipsetExynos W920 (5 nm)
CPUDual-core 1.18 GHz Cortex-A55
GPUMali-G68
Memory Card SlotNo
Internal16GB 1.5GB RAM
Main Camera (Single)No
LoudspeakerYes
3.5mm JackNo
WLANWi-Fi 802.11 a/b/g/n, dual-band
Bluetooth5.0, A2DP, LE
PositioningGPS, GLONASS, GALILEO, BDS
NFCYes
RadioNo
USBNo
SensorsAccelerometer, gyro, heart rate, barometer, compass
Natural language commands and dictation
Samsung Pay
Natural language commands and dictation
Samsung Pay
Battery Type (Aluminum, 44mm)Li-Ion 361 mAh, non-removable
Battery Type (Aluminum, 40mm)Non-removable Li-Ion 247 mAh battery
Battery Type (Classic, 46mm)Li-Ion 361 mAh, non-removable
Battery Type (Classic, 42mm)Non-removable Li-Ion 247 mAh battery
ChargingWireless (Qi)
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