The OWI CRS201PMICPACK Infrared Wireless Microphone System is 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. Because the CRS201 is wall-mounted, there are no freestanding or rack-mounted components to take up closet space or be knocked off a shelf, and no unsightly tangle of wires. The CRS201-P System 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.