Amazfit Stratos 3
Size : 48.6 x 48.6 x 13.4mm
Battery life : 35 hours (GPS mode)
5ATM
Music player
GPS/GLONASS/Galileo/BeiDou
Bluetooth 4.2 BLE 5.0
WiFi 2.4GHz 802.11b/g/n
NFC
Firstbeat features (8)
VO2max Fitness Level
Training Effect: Aerobic
Training Load
Recovery Time Advisor
Real-Time Performance Condition
Personalized Training Plans: Cardio
Real-Time Coaching
Calories Burned https://cn.amazfit.com/stratos-3.html