Cowboycool Set Large L Replacement Bands with Clasps for Fitbit Flex Only /No Tracker/ Wireless Activity Bracelet Sport Wristband Fit Bit Flex Bracelet Sport Arm Band Armband (Black+Navy, L)

Track steps & speed & time & distance
Calculating Calories and fat burned
Monitor sleep quality and performance

Turns your iPhone into a pulse oximeter to monitor oxygen and heart rate
Clinical-grade, non-invasive, fingertip pulse oximeter sensor
Allows charging of iPhone during use

The Lifeband Touch Activity Tracker smart watch is compatible with most of the latest Android and Apple devices. It connects to your device using its Bluetooth 4.0 technology and is easy to use once you first install it, with music control, call and text notification, interval training mode and it comes with a variety of […]

Pedometer : Can whenever and wherever possible to step,View the current training situation and remaining unfinished step number.
Sleep Monitoring: Intelligent monitoring to sleep at night, Up in the morning can see sleep last night, There will be five diagram,Said sleep is very poor , Said poor sleep, said sleep usually , Said sleep good , According to sleep very well.
Bluetooth: smart wristband via Bluetooth to sync to APP, Energy consumption, sleep data at a glance.