The entire system can be switched between 4 different frequencies with easy color-coded switches. Add additional transmitters to have up to 4 different channels of audio simultaneously! Go Wireless in your classroom with plug and play simplicity.

Transmits high quality audio via VHF to W901 series headphones that transmit up to 300 foot range (maximum of 300 feet with optimal environment). Connects to any analog audio source through a 1/8" stereo mini plug. Switchable between 4 frequencies (Blue - 72.500 MHz, Yellow - 72.100 MHz, Green - 72.900 MHz, Orange - 74.700 MHz)

Multi-channeled headphone. Get 50 hours of listening time between charges with only an 8 hour charge time. Superb sound quality without wires or interference. Powered by classroom friendly internal NiMH battery with 40 hours of operating time between 8-hour charges. Switchable between 4 frequencies (Blue - 72.500 MHz, Yellow - 72.100 MHz, Green - 72.900 MHz, Orange - 74.700 MHz).