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F81 best smartwatch

StyleSmart Watch for respiratory rate
Screen Size1.28inch full round 240*240  IPS
Screen Stylefull touch, G+F full lamination
Master ChipNordic52832
PPG chipSLR7R30
Temperature sensorCT1711 array
Bluetooth4.2BLE(Low power)
ChargeMagnetic absorption
ButtonFull Touch+1 Buttons
Case Top Covermetal alloy
Case Bottom CoverPC+ABS
StrapTPU, Leather+Silicone, Metal
battery200mAh
Work Time6-13 days
Standby Time20-40 days
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