Don’t just listen to your body. Know it
- Track your fitness progress with our first smartwatch that conveniently measures body composition. Get to know your body fat percentage, skeletal muscle, body water and more to achieve your goals. The Samsung BioActive Sensor and our fastest chip brings the biggest innovation to Galaxy Watch yet.
Your workout buddies have your back
- Enjoy every step you take with your friends and family with the Galaxy Watch4. Track your steps and compete with friends in a fun competition through a live message board. Challenges come with commemorative badges and a point system to make exercise fun, motivating and socially rewarding.
Name a workout. It can track it
- Track your activities and fitness scores on your watch and phone. Count steps, check calories, and stay on the grid with GPS. Galaxy Watch4 detects physical activity to track your routines and supports more than 90 exercises for a more accurate report of your workouts.
All the data your heart desires
- Meet the Samsung BioActive Sensor that measures ECG and blood pressure in real time. After initial calibration, the sensors quickly check your blood pressure. You can also check abnormal heart rate and rhythm through ECG and send data straight to your phone to be easily shared.
The most holistic sleep analysis on Galaxy watch
- The sleep tracker detects and holistically analyzes your sleep stages while you rest. Improved measuring options let you check your blood oxygen levels and snoring patterns (not saying you do). Plus, get advanced insights from the National Sleep Foundation for better sleep quality and duration.
Sleek, Seamless, Iconic
- Galaxy Watch4 features a simple design with a streamlined Armor Aluminum metal frame. It offers high-end looks and functionality for your workouts and day-to-day tasks.
New OS
- The first smartwatch with Wear OS Powered by Samsung, Galaxy Watch4 puts seamless access to your favorite apps on your wrist. You'll get a rich app selection from music streaming apps to anything in the massive library of health and fitness apps

Tech Specs:
Connectivity
- Location Technology: GPS, Glonass, Beidou, Galileo
- Wi-Fi: 802.11 a/b/g/n 2.4 5GHz
- Bluetooth Version: Bluetooth v5.0
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: 1.18 GHz
- CPU Type: Dual-Core
Memory
- RAM Size (GB): 1.5
- ROM Size (GB): 16
Sensors
- Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor, Optical Heart Rate Sensor, Electrical heart sensor, Bioelectrical Impedance Analysis Sensor
Physical specification
- Dimension (HxWxD): 44.4 x 43.3 x 9.8 mm
- Weight: 30.3 g
Battery
- Battery Capacity (mAh, Typical): 361
- Removable: No
- Typical Usage Time (Hours): Up to 40 Hours
Audio and Video
- Audio Playing Format: MP3, M4A, 3GA, AAC, OGG, OGA, WAV, AMR, AWB

What's in the box
1 x Galaxy Watch4
1 x Quick Start Guide

Brand Samsung
Has GPS Yes
Warranty Limited (12 months)
Materials 
Fluoroelastomers
Bezel Size 44.0 mm
Strap Size 20.0 mm
Has GLONASS Yes
is Portable Yes
Screen Size 1.4'
Model R870NZKAXFA
Has Altimeter Yes
Connectivity Bluetooth
Has Music Player Yes
Has Step Counter Yes
Has Sleep Monitor Yes
Water Resistant Yes
Merchandising Tags September 2021
Assembled Dimensions 4.44 x 4.33 x 0.98 cm
Has Calorie Counter Yes
Has Distance Tracking Yes
Has Heart Rate Monitor Yes
Operating System Compatibility Android
Has Smart Notification Technology Yes
Colour Name Black
Basic Colours Black