Sennheiser E935 Professional Cardioid Dynamic Handheld Vocal Microphone with AKG K 240 Studio Professional Stereo Headphones Bundles:With Studio Headphones Individually switchable phantom power supplies featuring a metal housing Individually switchable phantom power supplies allows the flexibility to use dynamic and condenser microphone simultaneously and low cut filter switches eliminate hum the paper can be processed using standard black and white chemistry in either trays or using machine processors It's 40 16 The E935's cardioid design effectively rejects off axis noise and feedback while an integral hum compensation coil minimizes hum caused by electrical current