[Connect Multiple Headphones] With the Audiplex 2403s, you and your family can enjoy an outdoor movie party or a silent concert without disturbing the neighbors; the 2403s wireless kit lets you have multiple headphones connected to one audio source, and even though it only comes with three receivers, it is scalable. You can purchase additional receivers and connect up to 100 of them to the same transmitter. [Universally Compatible] The transmitter dongle of the 2403s can transmit audio from any audio device that outputs audio through an AUX or optical jack TV, Projector, Stereo Receiver (via 6.35mm adapter), Blu-ray Player and even some electric musical instruments. The receiver dongles can be used with any audio receiving device that supports AUX, for instance, headphones or speakers.