Nady HM-1 Headset Microphone Top performing headworn microphone for all hands-free singing and speaking applications Perfect for singers/musicians (drummers, keyboardists), DJ's, aerobic instructors, etc. Lightweight, rugged construction and ergonomic design, for optimum comfort and durability High sensitivity, wide bandwidth, and cardioid polar pattern ensure clean transparent audio and enhanced close-up vocal pickup with improved gain before feedback and suppression of irritating backround noise UM-4 dynamic mic element requires no phantom powering or troublsome batteries aswith condenser elements used in other headworn mics