Miki Microphone Cable with Integrated pre-Amplifier Just 1 cable to connect your mic, headphone and mobile device Field proven by major broadcasters worldwide 2 Meters of professional microphone cable with integrated preamplifier (Gain +7 dB) and headphone output No batteries required 3 Position slide switch to select Hi, Lo(att:-10 dB) or Line(att:-40 dB) input sensitivity