Reliable line of sight connection that stretches up to 15m (50ft.) Pairing button enables plug-and-play compatibility Automatic re-pairing provides convenience Compatible with any powered speakers with a 3.5 mm or RCA connection For use with PC speakers, home stereo systems, or A/V receivers Tuned at Logitech labs for high quality acoustics Certified carbon neutral: the carbon impact of the product and packaging has been reduced to zero