The UAP-BeaconHD is a WiFi extender to be used with other Ubiquiti Access Points.
For example, it can extend the WiFi coverage of a UAP-nanoHD.
Unfortunately these are currently only available in a USA version, as they plug directly into the power outlet without an adaptor.
The good news is that existing Ubiquiti access points can also extend the wifi coverage in your house. Please see WiFi-Repeaters for options.