It is used for cordlessly sharing music from TV/PC/DVD/CD/VCD/MP3/MP4/IPOD.etc Being fit for other consumer electronics in 3.5mm or lotus audio output sockets. Its receiver could be used as FM radio with channel scanning automatically. Several receivers can share one transmitter. SPECIFICATIONS Transmitter: Transmitting frequency: 83MHZ Power supply: AAA DC1.5V batteries Cable plug: 3.5 mm stereo and lotus Receiver: (headphone) Receiving frequency: 83-108MHZ FM receiving frequency: 88-108MHZ Power supply: AAA DC1.5V batteries Wireless receiving distance: Max. 30 meters