Small, Bluetooth, OLED, Li-Po
Fitbit Charge, S, Wristband activity tracker, OLED, Waterproof, Black
Fitbit Charge, S. Display type: OLED. Device type: Wristband activity tracker, Product color: Black, Housing material: Thermoplastic elastomer (TPE). Bluetooth version: 4.0 LE. Battery life: 10 day(s), Battery technology: Lithium Polymer (LiPo), Charging time: 2 h. Width: 0.827" (21 mm)