• Exclusively developed full-range speaker unit with Φ 1.2-inch (30-mm) apertures on the left and right.Equipped with small-caliber diaphragms with resistance to split vibrations and superior playback of high-range frequencies. Just put it around your neck for a powerful media experience far beyond its size • The left and right speakers also each feature a "passive radiator" diaphragm to enhance the bass output.Watch your favorite movie action scenes or play your favorite live concert recordings to experience the low drums and bass as vibrations.Vibration and sound unite once you put the speakers in your ears. Compact unit offers a dynamic experience that makes it seem as if you’re right at the event.Vibration adjusts to three levels (strong, medium, and weak) • Features wireless transmission technology that prevents sound skipping and latency between speaker and transmitter.Speakers are also strongly resistant to interference and disruption, so you can walk away from your TV during viewing with the speakers on and continue to listen. No worries; these speakers allow you to enjoy listening with any movement or in any position • Connect 2 speakers per transmitter • Distance Range: Approx. 98.4 ft. (30 m); Unobstructed view, w/ 1 speaker connected; Approx. 32.8 ft. (10 m); Unobstructed view, w/ 2 speakers connected