EACHSHOT BOYA BY-WM6 UHF Professional Omni-Directional Lavalier Wireless Microphone Recorder System for ENG EFP DV DSLR Camera Camcorders With EACHSHOT Cleaning Cloth Compander for High-quality and Clear sound 48 UHF Channels,Camera-Mountable Receiver Mic and Line-in RF output power: 20 mW Selectable Mute function