RadTech WaveJamr Bluetooth Wireless Speaker Dock Adapter for Speakers and Sound Systems - Retail Packaging - Slate Gray Wirelessly transmit audio from any Bluetooth-enabled device to most docking and discreet audio systems High-Fidelity A2DP with aptX technology combined with advanced audio codec's deliver true wired-quality sound Minimum range of 10 meters (33 feet) through multiple walls and objects - open air range 50-55 feet