Xiaomi Smart Band 9 Wristband activity tracker

Xiaomi Smart Band 9
Screen type: Digital
Display diagonal: 4.11 cm (1.62")
Screen resolution: 192 x 490 pixels
Device type: Activity sensor wristband
Form factor: Oval
Product color: Black
Heart rate sensor type: Optical
Battery life: 21 days
Battery performance: 233 mAh
Charging time: 1h
Weight: 15.8g
Width: 21.6 mm
Depth: 46.5 mm