The Revolabs Solo RF-Armor Wireless Omnidirectional Microphone features RF-Armor, allowing it to be used in direct contact with all wireless electronic devices known to cause unwanted RF audio interference (radio frequency interference).This Solo Microphone features high quality wideband audio for exceptional voice reproduction in a very small form factor. The Solo RF-Armor Tabletop Wireless Microphones have exceptionally robust shielding, which enables the microphone to operate cleanly even when in direct contact with all wireless electronic devices known to cause unwanted audio interference, such as GSM mobile phones, smartphones, etc.