BOYA BY-WM5 2.4GHZ Wireless Lavalier Microphone System for DSLR Camera Camcorder Compact, High Performance and Lightweight. Two-way communication, but only sound from transmitter can be recorded. The low-cut filter will prevent low end noise and record conversation clearly. The operation range is 60m without obstacle, 360 degree all-round revolves workable and the maximum distance can reach up to 80m. Compatible with DSLR cameras, camcorders, audio recorder etc. & designed for portable wireless operation, such as film work, podcasting, performances and other audio or video applications.