PDA103L Small Room Loop Kit (PDA103, AMT Mic, 40m Loop)The PDA103L Small Room Loop Kit is everything you need to create a high quality fixed hearing loop system for small meeting rooms, council chambers or doctors\' surgeries (etc.). The amplifier includes metal compensation controls to improve intelligibility in rooms with high metal content. In addition, the state of the art audio processor features an automatic gain control which compensates for poor microphone techniques and helps suppress loud