smartwatches

Samsung Galaxy Watch 4

SamsungWear OS 3 (upgradable to Wear OS 5 with One UI Watch 6)2021

Buy Now:

Tap to enlarge

Compare Device

Device Specifications

Detailed technical specifications and features for the Samsung Galaxy Watch 4

Processor

ProcessorSamsung Exynos W920 (5 nm, Dual-core 1.18 GHz Cortex-A55, Mali-G68 GPU)

Display

Display1.2" (30.4mm) Super AMOLED (396x396 pixels, ~330 PPI), Corning Gorilla Glass DX+

Battery

Battery Life247 mAh capacity, Up to 14 hours (Usage time) / 24-40 hours (typical usage, depending on AOD/features) / Up to 55 hours (standby time)

ChargingWPC-based Wireless Charging (takes approx. 1.5 - 2 hours to full charge, 5W max)

Sensors

SensorsSamsung BioActive Sensor (Optical Heart Rate + Electrical Heart Signal + Bioelectrical Impedance Analysis - BIA), Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor, GPS (A-GPS, GLONASS, Beidou, Galileo), Blood Pressure Monitor, ECG (Electrocardiography), SpO₂ Monitor (Blood Oxygen), Sleep Monitor (tracks sleep stages, snoring, blood oxygen), Pedometer (tracks steps, distance, calories), Female Menstrual Cycle Tracker, Stress Tracker, Breath Training Sensor

Water Resistance

Water Resistance5 ATM (water resistant up to 50m depth, not for diving or high-pressure water activities) + IP68 (dust/water resistant up to 1.5m depth for 30 mins) + MIL-STD-810G compliant (resists extreme temperatures, altitude, vibration, shock)

Connectivity

ConnectivityLTE (optional with eSIM), Bluetooth 5.0 (A2DP, AVRCP, HFP, HSP), Wi-Fi 4 (802.11a/b/g/n, dual-band 2.4GHz+5GHz), NFC, GPS

Physical Aspects

DesignCircular dial, Aluminum frame, flat design, Corning Gorilla Glass DX+ front, standard 20mm interchangeable straps (Hybrid Leather Band and Sport Band options), 2 push buttons

Weight25.9g

Features

Special FeaturesFirst Wear OS Samsung Watch (co-developed with Google, features Wear OS Powered by Samsung and One UI Watch), Bluetooth Calling (LTE variant with eSIM, supports calls from the wrist, needs initial pairing with eligible Android 6.0+ smartphone with GMS), AI Voice Assistant (Bixby, Google Assistant compatible), Body Composition Analysis (BIA, measures body fat percentage, skeletal muscle, body water, basal metabolic rate; not recommended if pregnant, with pacemaker/medical devices, or under 20 years old), Fall Detection (needs to be enabled in Galaxy Wearable app), Sleep Tracking (tracks sleep stages, snoring, blood oxygen, requires pairing with smartphone for full functionality), Advanced Sleep Insights (from National Sleep Foundation), Sleep Coaching (4-5 week coaching program with tips, missions, checklists based on sleep patterns), 90+ Workout Modes (some with auto-detection for running, walking, cycling, etc.), Heart Rate Monitoring (24/7 dynamic tracking, high/low heart rate alerts), ECG (Electrocardiography, requires calibration with cuff-based monitor), Blood Pressure Monitoring (requires cuff-based monitor for calibration), Multiple Watch Faces (cloud-based customization, AR Emojis, animated graphics), Remote Camera Control, Music Control (cannot store music/control volume on watch, depends on app access), Smart Notifications (calls, texts, social media alerts), Find My Phone, Sedentary/Drink Water Reminders, Weather Forecast, Alarm/Timer/Stopwatch, Samsung Wallet (for payments, IDs, tickets), Samsung Health app integration (required for full health data viewing, supports integration with Samsung Health version 6.21+), Samsung Health Monitor app (required for ECG/Blood Pressure), Google Wear OS Features (access to Google Play Store apps like Google Maps, Google Assistant, YouTube Music, Strava, Calm, Spotify), Multiple UI Styles, Caller Name Information, Call Rejection, Wake Gesture, Vibration Alert, Do Not Disturb Mode, Screen Brightness adjustment, Watch-Mobile Interworking for cycling (display data on phone's screen), Seamless connection with Samsung Galaxy devices (control ANC on Galaxy Buds, enable phone apps), Compass feature, 1.5GB RAM + 16GB Internal Storage (7.6GB user accessible), Compatible with Android 6.0+ phones with GMS (Google Mobile Services) and 1.5GB RAM or more, Requires Galaxy Wearable app for initial setup