Misfit Ray
Tech specs 
Size12mm diameter, 38mm length
MaterialRay: Anodized aircraft-grade aluminum
Sport Band: TPU
ChargingNo
BatteryThree 393 button cells
Battery lifeUp to 6 months
Water-resistanceUp to 50 metres
Weight8 grams
Sensor3-axis accelerometer
DisplayLED
Screen size
ColorsCarbon Black, Rose Gold
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
Floors
SleepYes
Heart rate
Vo2Max
UV exposure
Skin temperature
Galvanic skin response
GPS
Running features
Swimming features
Smartphone notificationsVibration Alerts for alarms, calls, texts, and movement reminders
Other Vibration alarm
Links 
View onAmazon, Misfit
Amazon US rating3.4 out of 5 stars
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