Using the HP10 headphones with a Boss Monitor
Several 
video monitors include a wireless infrared transmitter. The transmitter sends a
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.