The boya by-bm3011 is a cardioid condenser directional microphone, which is suitable for general sound recording, for example on location. the by-bm3011 is compatible with dslr cameras, camcorders, audio recorders, tablets and smartphones. for reliable sound, this directional microphone is equipped with a built-in shock absorber. this reduces unnecessary vibrations to a minimum. the wind filter reduces wind noise. Technical details by-bm3011 You attach the directional microphone to your camera using the 1/4" female threaded connection or coldshoe. with the supplied 3.5 mm cables you can connect your camera or smartphone to the microphone. the by-bm3011 can be switched on with the on/off button, after which the microphone is immediately ready for use. with the indicator light you can see if the microphone is switched on. the by-bm3011 is powered by an aaa battery (not included). Usage by-bm3011 The by-bm3011 records calls, meetings, presentations and performances in high quality. the by-bm3011 is universally applicable, for use with smartphones and cameras. if your smartphone does not have a 3.5 mm port, you can use an adapter (usb-c to 3.5 mm female or lightning to 3.5 mm female). for an iphone or ipad we have a direct cable from lightning to 3.5 mm male available. this can be found with the optional accessories.