ANiceS Universal Fashiona Replacement Clasp for Fitbit Flex Wireless Band (ONLY A CLASP),Black

It is a revolutionary system designed to help you manage your weight, sleep better, and stay fit
Activity monitoring; intelligent wake; sleep monitoring; rest remindering; calorie consumption; incoming call alert; idle remindering
Compatible with many phones equipped with Bluetooth 4.0 and running Android 4.3 or later, and iOS 6.0 or later

This smart bracelet with OLED screen clearly displays health parameters including steps, calories, distance, time and sleep quality.
With silicone adjustable wristband, light weight feature, you can wear it comfortablely, such as running, climbing.
When you do exercise, it can record your sports data. When you sleep, it can monitor your sleep. It also can wake you up by vibrating gently.

Limited in production run
Ideal for monitoring calorie burning.
Helps weight loss

Sleep Quality
Advanced Calorie Tracking
ECG Accurate Heart