Boya by-m1 is an omni directional lavalier microphone, designed for smartphones, dslr, camcorders, audio recorders pc etc, it is perfect for video use.
Kindly note: 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 etc:- switch on the microphone. Slide the on/off up to on