Bought them in September, used them only once.
Pick up on campus.

More details:

RCA WHP141B 900MHZ Wireless Stereo Headphones

Imported
Transmits audio signal up to 150 feet, through walls, floors and ceilings
Phase-Lock Loop (PLL) technology locks in frequency to prevent signal loss
40mm speakers for outstanding sound performance
3-channel selection on headphones and transmitter for easy tuning
Headphones charge on transmitter for easy storage and use
900 MHz transmitting frequency

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