Most-complete Garmin Forerunner 645 SmartWatch Specs

1.2
in.
Display
2.32
oz
of weight
Avg. rating:
(92%) (4185 reviews over 4 sources)

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Basics
Main categoryFitness smart watch
Included AccessoriesCharging cable
Available colorsBlack, Cerise, Rose Gold, Sandstone
Warranty1 year

AlphaSpecs
Release year2018
Release month02
Width (inches)1.65
Height (inches)1.80
Depth (inches)0.50
Width (mm)42
Height (mm)45.72
Depth (mm)12.70
Weight (grams)65.77
Connectivity
CompatibilityIPhone, Android, Windows smart phne
Bluetooth
Bluetooth Technology4.2
Bluetooth Profiles Supported
SensorsGarmin Elevate wrist heart monitor, Barometric altimeter, Gyroscope, Acelerometer, Thermomete
Audio Video Remote Control (AVRCP)
Battery Specs
BatteryLithium-Ion
Stand-by Time840 hours
Talk Time840 minutes (GPS Mode), 10080 minutes (Smartwatch mode)
Music Playback Time840 minutes (GPS Mode), 10080 minutes (Smartwatch mode)
Display
Dots per inch282.35 dots per inch
Display's superficy (in square inches)0.72 square inches
Display Resolution240 x 240
Display TypeMIP LCD
Display finishCorning Gorilla Glass 3
Display Size1.2"
Battery Specs
3G Talk Time840 minutes
Physical Specs
FinishStainless Steel
Rugged5 ATM (50 meters)
Claimed qualitiesComfortable fit
Special
  • Estimated wrist based heart data
  • Performance monitoring
  • Advanced running dynamics
Other Specs & Features
Included software
  • Smart features (Find my phone, Find my watch, Virb remote)
  • Activity tracking (Step counter, Move bar, Auto goal, Sleep monitoring, Calories burned, Floors burned, Distance traveled, Intensity minutes, Trueup, Move IQ, All-day stress tracking)
  • Fitness features (Automatic rep counter for strength training and cardio training)
  • Analysis features (Customizable data pages, Auto lap, V02 max, Custom alerts, Activity history)
  • Heart rate features (Hr zones, Hr alerts, Hr calories, Hr max (in percentage), Hr broadcast (Broadcast HR data over ANT+ over paired device))
Wristband detailsSilicone strap (20 mm)
User manualClick here

Description:

Also known as Garmin 645.

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