Bass Shakers work on the concept that low bass is mostly felt and not heard. The Pro Bass Shaker literally sends sonic vibrations through the material it is attached to allowing you to feel the earth-shaking bass from your music, movies or video game soundtracks. Highlight: Pro version bass shaker handles 50 watts for higher visceral experience -More driving force than a standard shaker to bring your theater chairs to life!! Feel earth shaking bass from your music videos and games like the pros. Add deep bass where space is limited like small vehicles. There's no distortion while enhancing the bass energy delivered from your stereo . Utilize conventional series parallel wiring configuration for larger surface areas. Feel the earth-shaking bass from your music, movies or video game soundtracks. The Pro Bass Shaker was originally designed for automotive applications to produce big car subwoofer bass without taking up valuable space in the trunk of your car. The Pro Bass Shaker is ideal for convertibles and sports cars, where installing a large car stereo subwoofer is not practical. Can also be used in the home to make your own movie or video game chair. The Bass Shaker simply mounts to the floorboard under the seat or to the bottom of a chair to send vibrations through the structure allowing you to feel awesome bass. The Pro version bass shaker handles 50 watts of power and produces more driving force than a standard shaker. Connects to an amplifier like an ordinary speaker. Use an array of Bass Shakers for larger surface areas like couches or love seats by utilizing conventional series parallel wiring configuration. Specifications: 6 Inch bass shaker Impedance: 4 ohms Usable frequency response: 20 to 80 Hz Fs:40 Hz Force peak:30 lbs. per ft. Dimensions: 6.2 inch dia. x2.5 inch H Weight: 1.41KG/PCSColour:black Material:plastic The actual product may have slight color difference or difference, which will not affect the use Package Contents: 1 * tactile ducer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.