UL listed infrared wireless microphone system. Included in combo 1 CRS201AMPMIX with 2 IR sensors, 2 pendant mics, 1 rechargeable battery, 1 pendant mic chargers, 1 lapel mic, 2 ea 1/4 inch Phono jack to 3.5 mini adapters, 2 keys and 4 each white P5278 loudspeakers, sold as combo. Ideal for classrooms, boardrooms, computer training rooms and hotel meeting rooms. The slim, fully lockable, wall-mounted infrared receiver/amplifier/mixer accepts three different line level inputs. The CRS201-P can simultaneously control two infrared wireless microphones, and each device can adjust its volume by independent controls to obtain the best audio effects for each individual room layout.