QSC IRH-280i Two channel IR headphones for HI and VI-N audio. Switch selects either 2.3 MHz or 2.8 MHz

• The headphones receive audio over infrared
• No RF interference problems of cross talk between auditoriums
• High quality sound ensures maximum intelligibility for the hearing and visually impaired
• Slide switch selects between 2.3 or 2.8 MHz
• Designed for low distortion and high clarity
• Provide DC and AC magnetic fields to drive automatic switching telecoils in hearing aids
• Include a 3.5mm jack to drive neck loops or "direct audio" inputs on hearing aids and implants
• Modulation LED meter for accurate level calibration
• Input range 100mV, to 30V R.M.S.
• Two channel over the head unit has sensors on both sides
• Power on/off slide switch and independent volume control for left and right ear
• Powered by two AAA batteries