The CC2541EMK includes:
Texas Instruments CC2541EMK
The CC2541 Evaluation Module Kit contains two CC2541 Bluetooth low energy Evaluation Modules, which can be used either as standalone modules (requires a power source and a simple carrier board like the SoC Battery Board (http://www.ti.com/tool/soc-bb)) or connected to e.g. the SmartRF05EB Evaluation Boards (included in the CC2540DK) for full control from the PC.
The evaluation modules can be used as a reference board for prototyping and for verifying the performance of the CC2541 RF IC.