Flex
645 Music
Watch 2
M400
 FitbitFlexRemove Buy NowGarmin645 MusicRemove Buy NowHuaweiWatch 2Remove Buy NowPolarM400Remove Buy Now

Basic Info

Suggested Price$100$450$350$200
Release2013201820172014

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heartn/a
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days7 days48 hours8 hours to 30 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNAn/a
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
ResolutionNA240 x 240480 x 480n/a
SizeNA1.2 inches1.38 inchesn/a
TouchNA
TypeLEDMIPP-OLEDn/a

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance1 ATM5 ATMIP683 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemNAAndroid Wear 2n/a
Apps
Music

All Wearables