This is the BC127, a highly flexible, low power, small form factor Bluetooth Version 4.0 Certified Audio module. Each module comes preloaded with BlueCreation Melody software, and is ideal for developers who want to quickly and cost effectively integrate Bluetooth functionality into a project.
The BC127 module is equipped with an integrated antenna and is able to run all Bluetooth stacks and codecs at low energy and power consumption (3.3V - 4.7V and 15mA). These modules have an maximum operating range of 30m, a maximum data rate of 3Mbps, and a frequency band of 2402MHz to 2480MHz.
Dimensions: 11.8mm x 18mm x 3.2mm