The Mi Band 2 manages to offer features normally found on more expensive fitness trackers at a fraction of the costbut you get what you pay for.
Redmi Smart Band 2
Xiaomi Mi Band 2 With OLED Display Heart Rate Monitor Waterproof Fitness Tracker 20 Days Battery Life
Xiaomi Mi Band 2 New Features & In-depth Review
Redmi Smart Band 2
Xiaomi Mi Band 2 review - Android Authority
Xiaomi Smart Band 7 review - Good fitness band with wasted potential & uncertainties - Reviews
Amazfit Active Smart Watch with Ai Fitness Exercise Coach, GPS, Bluetooth Calling & Music, 14 Day Battery, 1.75 AMOLED Display, Pink
Microsoft Band 2 review: All the pieces for a killer fitness tracker, but not a complete fit - CNET
Fitbit Charge 2 Heart Rate + Fitness Wristband, Plum, Large (US Version) : Sports & Outdoors
Amazfit Band 7 review: where did all the budget trackers go? - The Verge