The American Recorder Technologies Mic Trainer adjustable microphone distance controller allows you to find your perfect mic technique. It keeps your mouth at an ideal distance and angle from the mic, preventing the proximity effect that can make your vocals sound muffled or boomy. You'll be able to move freely without worrying about "eating the mic" or popping Ps and Bs. The Mic Trainer works with most popular vocal mics like the Shure SM58, giving you consistent, professional-quality sound at your shows and events. For singers, DJs, podcasters and public speakers, the Mic Trainer eliminates the guesswork so you can focus on your performance.