HD Wearable / Lapel Style Microphone.The Revolabs Executive HD Wearable Microphone features a rotatable clip for mounting on clothing, shirt lapels, pockets, etc. The microphone reproduces speech with CD quality fidelity and is intended for use with the Revolabs Executive HD wireless microphone system. With its internal lithium rechargeable battery, there are no batteries to change. Eight hours of operation is achieved on a single 2 hour charge. CD quality audio reproduction 8 Hours of operation on a single 2 hour charge. Rotating clothing ClipMute switch andLED. RF-Armor (impervious to RF Interference)- Rotatable clip allowing positioning of the mic for optimum pickup- High definition audio for exceptional voice reproduction.