Sennheiser e 835-S Dynamic Cardioid Vocal Microphone with On/Off Switch Gentle presence boost to even tonal response ensures clarity and projection Minimal Proximity effect provides consistently clear bass end performance when singing closer to or further from capsule Cardioid pick-up pattern provides good signal isolation and feedback rejection, enabling higher sound levels to be obtained Metal construction and internal shock-mount system minimizes handling noise Frequency response 40-16,000 Hz, Impedence 350 Ohms. Rugged metal housing