The VoiceLink Plus sound system is an essential complement to the interactive whiteboard system. The system features a single-channel wireless microphone receiver with a 20 watt amplifier to power two or four speakers. With a VoiceLink Plus wireless microphone system, the teacher’s voice will be clearly heard throughout the room with ease. And the auxiliary input on the front panel allows the input of an iPod™, computer, or DVD to supplement the instructional program.