Image of a T-Rex
Image of a On Full Guard 2.5
Image of a 645 Music
Image of a Vivoactive HR
 AmazfitT-RexRemove Buy NowDieselOn Full Guard 2.5Remove Buy NowGarmin645 MusicRemove Buy NowGarminVivoactive HRRemove Buy Now

Basic Info

Suggested Price$140$325$450$250
Release2019201820182016

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration20 days4 days7 days13 hours to 8 days
Rechargeable

Compatibility

Android
iOS
Windows Phone
Macn/a
Windowsn/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution360 x 360454x454240 x 240148 x 205
Size1.3 inches1.39 inches1.2 inches1.38 inches
Touch
TypeAMOLEDMIPn/a

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM3 ATM5 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemBuild-inWear OSn/a
Apps
Music

All Wearables