The Audio-Technica <strong>ATIR-T85</strong> is a infrared lavalier microphone for the ATCS-60 conference system. It's lightweight, compact and the tie clip allows easy attachment and direction-angle adjustment. The transmitter clips to your belt and the microphone is a high-quality condenser element. It operates using 2 AA alkaline batteries. It has three output settings (ECO, LO, and HI). Continuous operation in ECO mode is approximately 10 hours.</p>