M400 Talkband B2 Band 2 Ray
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Basic Info

Suggested Price $200 $180 $250 $100
Release 2014 2015 2015 2016

Activity & Fitness

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

Battery

Duration 8 hours to 30 days 3 days 48 hours (without GPS) 6 months
Rechargeable

Compatibility

Android
iOS
Windows Phone n/a n/a n/a
Mac n/a n/a n/a
Windows n/a n/a n/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color n/a
Resolution n/a 128 x 88 320 x 128 n/a
Size n/a 0.73 inches 1.36 inches n/a
Touch n/a
Type n/a PMOLED Capacitative TFT LED

Functions

Audio Speaker Alerts only Bluetooth
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance 3 ATM IP57 IPX7 5 ATM

Notifications

Phone
Emails
Texts

Software

Operating System n/a n/a n/a n/a
Apps
Music

All Wearables