Xiaomi Mi Band 4 Fitness Tracker, Newest 0.95” Color AMOLED Display Bluetooth 5.0 Smart Bracelet Heart Rate Monitor 50 Meters Waterproof Bracelet with 135mAh Battery up to 20 Days Activity Tracker, Brought to you By XIAOMI.
with built in 135mAh Lithium Ion polymer battery, long battery life, Charge it once,
OllivanDirect is authentic seller authorized by xyloma,
This fitness tracker can track your heart rate 24 hours automatically
Download “MI Fit”, Connect via Bluetooth
50M Waterproof Rating,
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