The Revolabs HD Wireless lapel microphone provides exceptional voice reproduction.The Revolabs HD Wireless lapel microphone has a rotatable clip that allows the user to point the wearable microphone in the best position for capturing the sound.  Can be mixed and matched with the other HD Wireless Microphones with a Revolabs HD system. This lapel microphone is impervious to Radio Frequency (RF) interference!  It can be used in direct contact with all wireless electronic devices known to cause unwanted audio interference, such as GSM mobile phones, smart phones, etc.  Eight hours of continuous use on a single charge. Recharges in two hours. Feel free to walk around the room and enjoy the secure, crystal clear sound!