Product picture - TeachLogic IRV-3415 CS4 VoiceLink Plus Infrared Wireless Classroom Microphone System with 1 Sapphire Microphone & 4 Ceiling-Mount Speakers TeachLogic, IRV-3415, CS4, VoiceLink, Plus, Infrared, Wireless, Classroom, Microphone, System, with, 1, Sapphire, Microphone, &, 4, Ceiling-Mount, Speakers Click the image to close this page