Withings Steel HR
Tech specs 
SizeWatch: 36 mm or 40mm diameter, 11.5 mm thickness (0.45")
MaterialStainless Steel case with silicone strap
ChargingYes
BatteryCR2025
Battery life25 days
Water-resistanceUp to 50 m (5 ATM)
Weight49 grams (40mm version)
SensorDay & Night motion sensor
High precision MEMS 3-axis accelerometer
Low power consumption
Optical heart rate sensor
DisplayAnalog
Screen size36 mm or 40mm diameter
ColorsBlack (36mm also comes in White)
OtherPLATFORM: Propriatory
PROCESSOR: N/A
MEMORY: N/A
CONNECTIVITY: Bluetooth 4.0
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
FloorsNo
SleepYes
Heart rateYes
Vo2MaxNo
UV exposureNo
Skin temperatureNo
Galvanic skin responseNo
GPSNo
Running featuresNo
Swimming featuresCalories and duration
Smartphone notificationsYes (text, call and email alerts)
Other Silent alarm
Links 
View onAmazon | Withings | Best Buy
Amazon US rating3.6 out of 5 stars
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