Fitbit Flex Activity and Sleep Tracker Wristband FB401FLEXBK- Android iOS- Black Condition:Grade A 5 V output at 2

5 V output at 2

32GB Dual-channel LPDDR4x

lightweight design feels great in your hand and provides superior

* It makes every move more effective with less power consumption overall

8GHz quad-core Intel Core i7 (Turbo Boost up to 3

Fitbit Flex Activity and Sleep Tracker Wristband FB401FLEXBK- Android iOS- Black Condition:Grade A 5 V output at 2Genuine Fitbit name brand products, The Flex Series Activity Wristband. Model: FB401FLEXBK This model comes with an all black silicone band and display unit. Features: Compatible with Android, iOS, and Windows devices. Tracks all day activity like steps, distance, calories burned and active minutes Measure your sleep quality and wake with a silent, vibrating alarm LED lights show how your day is stacking up against your goal Fits comfortably around