BOYA BY-WM4 Pro Wireless Microphone 

• Record crystal-clear, distortion-free audio from your DSLR, camcorder, smartphone, or tablet. Perfect for filmmakers, vloggers, mobile journalists, and content creators.
  
  
• Listen to your audio in realtime with the headphone input to ensure accurate sound recording. For more control, adjust the microphone volume to reduce time in post-production. Each unit is powered by two "AAA" batteries for up to 6 hours of operation.
  
  
• Features an upgraded RF Chipset that broadcasts on the open 2.4GHz frequency spectrum, allowing for interference-free and regulation-free wireless transmission up to 200' ft (60m).
  
  
• Includes a transmitter with belt clip, receiver with belt clip and shoe mount, lavalier microphone, 3.5mm TRS cable for cameras, 3.5mm TRRS cable for smartphones and tablets, and a hard case.