Califone CLS729 Wireless RF Mono Headphones (72.9MHz, Green)

The CLS729 Wireless Mono Headphones from Califone are ideal for use in classrooms and other institutional venues. The headphones use RF technology to receive wireless audio from a receiver (sold separately) from up to 100' away! The headphones come tuned to 1 of 4 different color-coded frequencies, providing the potential to set up 4 different audio programs in the same area without crossover or interference. An unlimited number of headphones may be used with a transmitter.