Neewer&reg; NW-3301 Hands Free Lavalier Lapel Clip-on Microphone System: Transmitter + Receiver + Microphone + Batteries, Perfect for Presentation/Speech/Podcasting/Performance and More The system includes: (1)Belt Pack Transmitter + (1)Receiver with 1/4" Plug + (1)Clip-on Lavalier Microphone + (1)9V Battery for Transmitter + (1)AA Battery for 1/4" Receiver Allowing an operation range up to 65.6ft/20m Working with a large frequency range: 114-116MHz Hands-free design, easy to clip it to the shirt, tie and pocket Small and compact, perfect for presentations, speeches, podcasting, performances and many other audio or video applications