Network/Bearer: Bluetooth, Wi-Fi
Connectivity:
Location Technology: GPS,Glonass,Beidou,Galileo
Wi-Fi: 802.11 a/b/g/n 2.4+5GHz
NFC: Yes
Bluetooth Version: Bluetooth v5.0
Bluetooth Profiles: A2DP,AVRCP,HFP,HS
OS: Wear OS Powered by Samsun
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: 1.18GHz
CPU Type: Dual-Core
Memory
RAM Size (GB): 1.5
ROM Size (GB): 16
External Memory Support: N/A
Available Memory* (GB): 7.
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

Samsung Galaxy Watch4 Bluetooth (44mm) - Silver (SM-R870NZSAXSA), 1.4' Super AMOLED Display, 1.5 GB RAM/ 16 GB ROM