Designed specifically for the Sound Touch 300 sound bar system, if you love the sound but require a little bit more on the low end, perfect for great cinema like performance, this is a great addition.A cleverly design housing enables a generous sized port which has also been designed using Quiet Port technology, which virtually eliminates distortion. The subwoofer connects wirelessly to the Sound Touch 300 soundbar & is the best performance you can get from a subwoofer of this size, let it immerse you fully into your home entertainment system.