CRS101IC54 Speaker Package includes the CRS101 Infrared Wireless Microphone System and four UL-listed IC5 5-inch in-ceiling 8 ohms speakers. 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. The CRS101IC5 System comes complete with four OWI IC5 ceiling speakers.