Hamilton W900-Multi Transmitter - Transmits high quality audio via FM to W901 series headphones within a 300 foot range. Connects to any analog audio source through a 1/8" stereo mini jack.
Switchable between 4 frequencies:
Blue - 72.500 MHz Yellow - 72.100 MHz Green - 72.900 MHz Orange - 74.700 MHz
Superb sound without cords or wires - no interference from other electronic equipment Operates on dedicated channels Listen with an infinite number of headphones on one frequency with one transmitter One (1) year warranty.