UL listed infrared wireless microphone system. Included in combo 1 CRSCASE with 2 IR sensors, 1 pendant mic, 1 battery, 1 charger, 1 lapel mic, 2 keys and 4 each black P5278 loudspeakers, sold as combo (limited quantity). The CRS101 infrared wireless microphone system (UL listed) 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 CRS101 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 CRS101 System can simultaneously control two included infrared wireless microphones, and each device can adjust its volume by independent controls to obtain the best audio effects for each individual room layout.