The MIPRO ACT-707TE (6B) Standard Bodypack Transmitter that utilizes the world's first ACT (Automatic Channel Targeting) function, which provides rapid automatic channel setting and boasts an advanced efficient transmitting and low power consumption circuit design. Its LED indicator displays power on/off and battery status while possessing an impedance selectable switch for microphone or guitar, and built-in sensitivity level adjustor. Compact, lightweight and streamline shape for easy wearing, it also features an innovative "Photo-cell Coupling" high dynamic range and high fidelity modulation circuitry which is capable of accepting high input level and less distortion. Furthermore, an industry standard mini-XLR 4-pin (TA4F) connector is utilized for quick and screw lock connection and accepts lavaliere, headworn microphone and guitar inputs with level adjustments. It also has a 22 hour battery life per single 9V battery.