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Garmin 645 Music Garmin Vivosmart 4 Polar A370 Polar Loop

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Price and Release Date

Suggested Price$450$130$179.95$100
Release / Update2018201820172013

Activity & Fitness

Calories
Distance
Heart$
VO2max (Oxygen)
Sleep
Steps
Stress mgt
Female health
Skin temp
Breath rate

Battery

Duration7 days7 daysUp to 3 days5 days
Rechargeable

Compatibility Support

Android
iOS
Windows Phone
Macn/a
Windowsn/a

Connectivity Support

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution240 x 24048 x 128160 x 80
Size1.2 inches0.74 inches1.18 inches
Touch
TypeMIPOLEDTFT LCDLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATMWR302 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/a
Apps
Music

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