The shure sm39 condenser headset microphone is ideal for performers who need clear consistent sound and total freedom of movement'. '.strtoupper('d')esigned with comfort and durability in mind its low profile fit contours naturally to your ear and jawline so you can wear it for long performances without discomfort'. '.strtoupper('t')he cardioid polar pattern rejects over 20 db of off axis noise delivering precise vocal clarity even in loud environments.compatible with shure axient digital and other wireless systems it ensures a secure seamless connection during every show'. '.strtoupper('t')he sm39 comes with indoor and outdoor windscreens guaranteeing reliable sound no matter where you perform'. '.strtoupper('p')lus its hydrophobic coating provides sweat resistance making it perfect for high energy performances.