Bought to replace the bluetooth adapter on my keyboard Rii Mini (RT-MWK02 +) that had a really insufficient range (about 1m) to control my HTPC, this Bluetooth adapter, even if it does not work within the reach of 100m announced, fulfills its role with seamless operation in a radius of about 4m. This adapter is recognized without problems under Ubuntu 14.04 (unlike the one provided with the Rii Mini). Small problem: the blue LEDs, very bright, flashing constantly, even without a connected Bluetooth device. Better hide for use in the living room.