We are specilizing in whole house music system(keypads),you just install the keypads in every zone in your house,including living room,kitchen,study,bathroom and balcony,etc,through single or various audio sources(DVD/CD/FM/PC/TV etc)to let music and video into every zone,you can select the audio source and adjust the volume independently in every room,you can also operate one of them to control the all,all of functions can be operated on the keypad or by remote control,let you listen to music as easy as switching lights.