Model NameApple Watch Series 4
Dimensions (Aluminum, 44mm)44 x 38 x 10.7 mm
Weight:- 36.7 g
Weight:- 36.7 g
Dimensions (Aluminum, 40mm)40 x 34 x 10.7 mm
Weight:- 30 g
Weight:- 30 g
Dimensions (Nike Aluminum, 44mm)44 x 38 x 10.7 mm
Weight:- 36.7 g
Weight:- 36.7 g
Dimensions (Nike Aluminum, 40mm)40 x 34 x 10.7 mm
Weight:- 30 g
Weight:- 30 g
Dimensions (Nike+ Aluminum, 44mm)44 x 38 x 10.7 mm
Weight:- 36.7 g
Weight:- 36.7 g
Dimensions (Nike+ Aluminum, 40mm)40 x 34 x 10.7 mm
Weight:- 30 g
Weight:- 30 g
Dimensions (Stainless Steel, 44mm)44 x 38 x 10.7 mm
Weight:- 48 g
Weight:- 48 g
Dimensions (Stainless Steel, 40mm)40 x 34 x 10.7 mm
Weight:- 40 g
Weight:- 40 g
Dimensions (Hermes Stainless Steel, 44mm)44 x 38 x 10.7 mm
Weight:- 48 g
Weight:- 48 g
Dimensions (Hermes Stainless Steel, 40mm)40 x 34 x 10.7 mm
Weight:- 40 g
Weight:- 40 g
Build (Nike Aluminum)Glass front, ceramic/sapphire crystal back, aluminum frame
Build (Nike+ Aluminum)Glass front, ceramic/sapphire crystal back, aluminum frame
Build (Aluminum)Glass front, ceramic/sapphire crystal back, aluminum frame
Build (Stainless Steel)Glass front (Sapphire crystal), ceramic/sapphire crystal back, stainless steel frame
Build (Hermes Stainless Steel)Glass front (Sapphire crystal), ceramic/sapphire crystal back, stainless steel frame
SIM (Aluminum)no eSIM or eSIM
ECG certified (region dependent SW application; HW available on all models)
ECG certified (region dependent SW application; HW available on all models)
SIM (Nike Aluminum)no eSIM or eSIM
ECG certified (region dependent SW application; HW available on all models)
ECG certified (region dependent SW application; HW available on all models)
SIM (Nike+ Aluminum)no eSIM or eSIM
ECG certified (region dependent SW application; HW available on all models)
ECG certified (region dependent SW application; HW available on all models)
SIM (Stainless Steel)eSIM
ECG certified (region dependent SW application; HW available on all models)
ECG certified (region dependent SW application; HW available on all models)
SIM (Hermes Stainless Steel)eSIM
ECG certified (region dependent SW application; HW available on all models)
ECG certified (region dependent SW application; HW available on all models)
Display TypeRetina LTPO OLED, 1000 nits (peak)
Display Size (44mm)1.78 inches
Display Size (40mm)1.57 inches
Resolution (44mm)448 x 368 pixels (~326 ppi density)
Resolution (40mm)394 x 324 pixels (~326 ppi density)
Protection (Aluminum)Ion-X strengthened glass
3D Touch display
3D Touch display
Protection (Nike Aluminum)Ion-X strengthened glass
3D Touch display
3D Touch display
Protection (Nike+ Aluminum)Ion-X strengthened glass
3D Touch display
3D Touch display
Protection (Stainless Steel)Sapphire crystal glass
3D Touch display
3D Touch display
Protection (Hermes Stainless Steel)Sapphire crystal glass
3D Touch display
3D Touch display
OSwatchOS
ChipsetApple S4
CPUDual-core
GPUPowerVR
Memory Card SlotNo
Internal16GB 1GB RAM
CameraNo
LoudspeakerYes
3.5mm jackNo
WLANWi-Fi 802.11 b/g/n
Bluetooth5.0, A2DP, LE
GPSYes, with A-GPS, GLONASS, GALILEO, QZSS
NFCYes
RadioNo
USBNo
SensorsAccelerometer, gyro, heart rate, barometer
Natural language commands and dictation (talking mode)
Natural language commands and dictation (talking mode)
Battery Type (44mm)Li-Ion 292 mAh battery
Battery Type (40mm)Li-Ion 225 mAh (0.86 Wh), non-removable
ChargingWireless charging
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