Product Detail Clear, natural sound quality Compact receiver is easy to mount on a camera UHF reception with 996 frequencies selectable in 25 kHz steps Automatic frequency scanning for easy selection of open channels Tone Lockâ„¢ squelch system eliminates interference when transmitter is off . The "ATW-1811D - 1800 Series Portable Wireless Microphone System" is best product for you. We recommended ATW-1811D - 1800 Series Portable Wireless Microphone System