Fitbit Alta
Tech specs 
SizeWidth 15mm
(Sizes depend on type of band)
MaterialStainless steel clasp, Classic band (elastomer), Metal band (stainless steel metal), Leather band (soft, genuine leather)
ChargingUSB
BatteryLithium-polymer
Battery lifeup to 5 days
Water-resistanceSweat, rain and splash proof.
Weight29 grams
Sensor3-axis accelerometer, Vibration motor
DisplayOLED
Screen size1.4-inch, 128 x 36 pixel resolution
ColorsClassic (Black, Blue, Plum, Peal); Leather (Bluish Pink, Graphite); Metal (Stainless Steel)
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
Floors
SleepYes
Heart rate
Vo2Max
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
GPS
Running features
Swimming features
Smartphone notificationsYes
Other Clock, auto sleep detection, silent wake alarm, auto exercise recognition.
Links 
View onAmazon | Best Buy | Target | eBay
Amazon US rating4.2 out of 5 stars
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