Boss Audio Systems BV10.4IRF User Manual page 13

Infrared Audio Transmission (BV10.4IRF and BV7IRF only)
The BV10.4IRF and BV7IRF monitors include a wireless infrared transmitter. The
transmitter sends a high-quality stereo signal which can be received by a pair of
Boss HP-10 wireless infrared headphones (sold separately).
The infrared signal is emitted from the large dark lens on the front of the monitor
console. Best sound will be obtained if you sit directly in front of the monitor within
about six feet. If you choose to sit to one side of the monitor, you can expect good
reception within 35º to the right or left of the monitor.
BVFL10.4 • BV10.4IRF • BV7FLIP • BV7IRF User's Manual - page 13