Amazfit Stratos 3/3+
Tech specs 
Size48.6mm diameter
13.4mm thickness
22mm strap
MaterialStratos 3: Stainless Steel, Sapphire Glass reinforced polymer material, soft silicone strap
Stratos 3+: Titanium alloy bezel, water-repellent sapphire mirrors, Fluoro rubber strap
ChargingMagnetic charging
Battery300mAh lithium ion
Battery life14 days in Intelligent mode; 21 days in Ultra mode.
GPS mode: accurate (35 hours); balance (45 hours) power saving (70 hours).
Water-resistanceUp to 50 metres (5 ATM)
Weight59.6 grams (standard edition); 68.7 grams (Elite edition)
SensorGPS/Glonas/Beidou/Galileo, Bio Tracker PPG Bio Tracking Optical Sensor, 6-Axis Accelerometer, 3-Axis Geomagnetic Sensor, Air Pressure Sensor, Ambient Light Brightness Sensor, NFC.
DisplayReflective low-power colour display (320x320 pixel resolutino); AF coated Corning Gorilla protected (standard edition); AF + AR coated sapphire (Elite edition)
Screen size1.34 inch touchscreen
ColorsSix colours
OtherPLATFORM: Amazfit OS
MEMORY: 512MB LPDDR3; 4G eMMC (1.GB available to user)
CONNECTIVITY: Bluetooth 4.2 BLE 5.0, WiFi 2.4GhZ 802.11 b/g/n
Activity tracking 
Calories burnedYes
Heart rateYes
Stress & recovery
Pulse Ox
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
Running features
Swimming featuresSWOLF, pace, stroke detection
Non-fitness functions 
Smartphone notificationsYes
On-board music storageYes
Connected payYes
Affiliate link*Amazon
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