Flex, LED, USB, Bluetooth 4.0
Fitbit Flex, Wristband activity tracker, LED, Waterproof, Black
Fitbit Flex. Display type: LED. Device type: Wristband activity tracker, Product colour: Black, Housing material: Stainless steel, Thermoplastic elastomer (TPE). Memory capacity: 30 day(s). Battery life: 5 day(s), Battery technology: Lithium Polymer (LiPo), Charging time: 2 h. Width: 14 mm