BOYA BY-M1 is an omni directional microphone, perfect for video Designed for Smartphones, DSLR, Camcorders ,Audio recorders, PC etc. The microphone features an Omni pickup pattern, for full, 360-degree Using the microphone: For Smartphone Switch off the microphone Slide the ON/OFF up to OFF/Smartphone The power is shut down. For DSLR, Camcorders, Audio recorders, PC ect Switch on the microphone. Slide the ON/OFF up to ON For use with the Lavalier Microphone on Action Cameras customers are requested to purchase "TRRS to TRS Adapter" then only it would work, One button switch between camera and smartphone mode power_source_type: battery powered