Amazfit Stratos
Tech specs 
SizeDiameter: 46mm
Thickness: 13.9mm
MaterialHand-polished ceramic frame. 316L stainless steel finish combined with other materials such as carbon fiber to provide the lightest weight possible.
BatteryLithium battery, 280mA
Battery life5 days regular use / 11 days basic use; GPS switched on 35 hours
Water-resistance5 ATM (50 meters)
Weight70 grams
SensorPPG heart rate sensor , Triaxial acceleration sensor, Gyro, Geomagnetic sensor, Barometric pressure sensor, Ambient light sensor, GPS/GLONASS
DisplayAlways-on transflective color LCD touch screen
Screen size320x300 pixel, 1.34 inch screen
OtherPLATFORM: Proprietary
PROCESSOR: 1.2 GHz dual core processor
MEMORY: 512 MB of RAM, 4 GB of storage (of which 2 GB is usable)
CONNECTIVITY: Bluetooth, WiFi.
Activity tracking 
Calories burnedYes
Heart rateYes
Stress & recovery
Pulse Ox
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
Running featuresTraining Effect, Recovery Time, Training Load and more.
Swimming features
Other AliPay, music and camera control, time, alarm, reminders and more
Non-fitness functions 
Smartphone notificationsYes
On-board music storageYes
Connected payAliPay mobile payments
Affiliate link*Amazon
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