Hang on tight while the mammoth T-Rex stomps across the big screen. Brace yourself for the jolt of the Titanic as it hits the iceberg. And most importantly, affordably transform your living room into a high-tech movie theater. These Butt Shakers have brought sound to life. The Butt Shaker is a low frequency device that enables the person sitting in the chair to feel rather than hear the low end (bass) of movies and music. Not a vibrating massage chair, the Butt Shakers are musically accurate and respond precisely to the bass track of movies and music, or the .1 and LFE channels on 5.1 systems. Butt Shaker equipped chairs connect easily to any home theater system and can be installed by consumers and professionals. Unlike a subwoofer or speaker, the Butt Shaker doesn't make the room overly loud or carry the sound throughout the entire house or apartment complex. This isolation of the low end within the seating makes Butt Shaker equipped chairs a favorite of wives and neighbors. Designed by musicians and studio engineers, the Butt Shaker is musically accurate with a tight, “on-the-beat” response that is not just for movies and special effects, but is equally enjoyable with all types of music. It connects easily to and works well with most any sound system, from a CD player to a complete home theater system. Video games come alive when played in a Butt Shaker enhanced seating and an unparalleled level of realism and excitement awaits gamers who use these chairs. 90 Day Warranty.