UP2
Mi Band 2
Mi Band 4
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Basic Info

Suggested Price$100$23$25
Release201520162019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Stepsn/a
Swim

Battery

Duration7 days20 hours20 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
MacNAn/a
WindowsNAn/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
ResolutionNAn/a120x240
SizeNA0.42 inches0.95 inches
TouchNA
TypeNAOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceSplash resistantIP675 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemNAn/aAMAZFIT OS
Apps
Music

All Wearables