Jawbone UP2
Tech specs 
Size220 mm x 11.5 mm x 3.0 - 8.5
MaterialMedical-grade hypoallergenic TPU rubber (strap), anodized aluminum (casing), TiN coated stainless steel (clasp)
ChargingMagnetic USB cable
BatteryRechargeable lithium polymer, 38 mAh battery
Battery lifeUp to 7 days
Water-resistanceSplash resistant
Weight25 grams
Sensor3-axis accelerometer
DisplayThree single-color LEDs, Blue for sleep, orange for activity, and white for notifications
Screen size
ColorsVarious
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 notifications
Other
Links 
View onAmazon | eBay
Amazon US rating3.1 out of 5 stars
Read moreArticle