Soundcast ACP-200 AudioCast Transmitter/Receiver Bundle Wireless transmitter and receiver for MP3 players, PCs, and other audio sources Sends audio signal wirelessly from source to home stereo system 2.4 GHz wireless FHSS technology produces clean, uninterrupted audio signal Supports up to 2 receivers at once; wireless line-of-sight range of 350 feet Includes audio cables; each item measures 6.8 x 2 x 3.5 inches (W x H x D); 1-year warranty