The MIPRO ACT-707HE (6B) is a handheld transmitter microphone that features a cardioid condenser microphone capsule that is ideal for vocal, providing high fidelity, wide frequency response, high dynamic range, rapid transient response, low echo feedback, clarity and accuracy sound image, contributing the best sound quality in the digital audio age. Its patented modularized capsule design provides extremely low handling-noise feature that other brands cannot compete. With its unique dual steel microphone head-grille design, it eliminates pop & wind noises and prevents worsening of high pitch loss and directionality. Furthermore, it also utilizes the world's first ACT (Automatic Channel Targeting) function which provides rapid and automatic channel setting of the transmitter, while its high fidelity modulation circuitry which is capable of accepting high input level and less distortion. Other functions and features include advanced efficient transmitting and low power consumption circuit design, 22 hour battery life per single 9V battery, LED panel display, and power switch located on the housing for easy operation.