Microsoft Band 2
Tech specs 
Sizesmall (145 – 165mm wrist circumference), medium (160-190mm), large (185-215)
MaterialThermal plastic elastomer silicone vulcanite with adjustable-fit clasp
ChargingUSB magnetic connector cable
BatteryLithium-polymer
Battery lifeUp 48 hours of normal use – less with GPS switched on
Water-resistanceDust and splash resistant
Weight60 grams
SensorOptical heart rate sensor, 3-axis accelerometer/gyro, gyrometer, GPS, ambient light sensor, skin temperature sensor, UV sensor, capacitive sensor, galvanic skin response, microphone
DisplayAMOLED
Screen size12.8mm x 32mm (320 x 128 pixels)
ColorsBlack
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
FloorsYes
SleepYes
Heart rateYes
Vo2MaxYes
Stress & recovery
UV exposureYes
Skin temperatureYes
Galvanic skin responseYes
GPSYes
Running features
Swimming features
Smartphone notificationsYes
Other Music control
Links 
Affiliate link*Amazon | eBay
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