Samsung Galaxy Watch 4 Classic
Quick details
Released
2021-08
Dimensions
46 mm: 45.5 x 45.5 x 11.0 mm; 42 mm: 41.5 x 41.5 x 11.2 mm
Operating system
Wear OS 3 Powered by Samsung; One UI Watch
Display 46 mm: 1.36 inches; 42 mm: 1.19 inches Super AMOLED, full-colour Always On Display
Battery life Up to 40 hours
Water resistance 5 ATM; IP68; MIL-STD-810G
GPS Yes
Sensors accelerometer, gyroscope, barometer, compass, geomagnetic sensor, optical heart rate, electrical heart sensor, SpO2, ambient light, GPS
Technical specifications
General
Release date 2021-08
Product type Smartwatch
Physical size 46 mm: 45.5 x 45.5 x 11.0 mm; 42 mm: 41.5 x 41.5 x 11.2 mm
Weight 46 mm: 52.0 g; 42 mm: 46.5 g
Material Stainless-steel case with rotating bezel
Water resistance 5 ATM; IP68; MIL-STD-810G
Color options Black, Silver
Display type Super AMOLED, full-colour Always On Display
Display size 46 mm: 1.36 inches; 42 mm: 1.19 inches
Display resolution 46 mm: 450 x 450 pixels; 42 mm: 396 x 396 pixels
Display protection Corning Gorilla Glass DX
Battery Built-in rechargeable battery; 46 mm: 361 mAh; 42 mm: 247 mAh
Battery life Up to 40 hours
Charging WPC-based wireless charging
Sensors
GNSS type Built-in GNSS
GPS Yes
GALILEO Yes
GLONASS Yes
QZSS No
Beidou Yes
Accelerometer Yes
Gyroscope Yes
Barometric altimeter Yes
Compass Yes
Geomagnetic Yes
Ambient light sensor Yes
Optical heart rate Yes
Electrical heart rate Yes
SpO2 Yes
Temperature No
Galvanic skin response Yes
Microphone Yes
Speakers Yes
Vibration motor Yes
Health & activity tracking
Steps Yes
Distance Yes
Calories burned Yes
Floors Yes
Sports tracking Yes
Sleep Yes
Heart rate Yes
HRV No
Stress Yes
Blood oxygen Yes
Respiration rate No
Skin temperature No
ECG Yes
Blood pressure Yes (Samsung Health Monitor; availability varies by market, calibration required)
Body composition Yes
Glucose No
Hydration level No
UV exposure No
Calorie intake No
Hyperglycemia risk assessment No
Arterial stiffness detection No
Pulse wave arrhythmia analysis Yes
Daily smart features
Smartphone compatibility Android with Google Mobile Services
Operating system at launch Wear OS 3 Powered by Samsung; One UI Watch
Processor Exynos W920 (5 nm, dual-core 1.18 GHz)
RAM 1.5 GB
Storage 16 GB
Bluetooth Yes (5.0)
Wi-Fi Yes (802.11 a/b/g/n, 2.4/5 GHz)
NFC / connected pay Yes
UWB No
Cellular Optional LTE/eSIM
Smartphone notifications Yes
Bluetooth calling Yes
Smartphone music control Yes
On-board music storage Yes
Voice assistant Google Assistant / Bixby
Links
These technical specs are correct to the best of our knowledge at the time of publishing.
