This is a Bluetooth 4.0 module（Bluetooth 4.0 slave module) .
This is a Bluetooth 4.0 module（Bluetooth 4.0 slave module）. Compared with Bluetooth version 2.0 and 3.0, it’s more advanced for its lower power consumption. You can easily connect your own project to the primary device of Bluetooth 4.0 by using this module. For instance, it can transfer the detected data which is about the information of your body to iphone for displaying or analyzing, then, help you better manage your physical condition.
You can find more modules here.
Note: This module is not compatible with any other Xadow version 2 or RePhone modules.