EZSync CC2540 Evaluation Module USB Dongle, BLE Bluetooth 4.0, CC2540EMK-USB compatible, Configured as BLE MONITOR HOST, EZsync102 The package contains 1x CC2540 USB Dongle. Please refer to "technical specification" section of this Amazon page for a quick user guide The device connects to a Windows PCs USB port, and is pre-loaded with the master demo application software, work with BLE Device Monitor and BTool to display services, characteristics and attributes of any Bluetooth low energy device including TI sensortag monitoring and OAD The device can be reprogrammed to be a BLE packet sniffer device and work with Packet Sniffer analyzing the BLE protocol and for software and system level debugging. Re-programming requires CC Debugger, EZSync106 or SmartRF05EB board support(not included)