Otherwise it is an ideal solution to wirelessly take with any film camera with microphone connector in the tone quite good and noise-free quality. Who has tasted the difference between the built-in microphone and an external microphone again, takes in voice or music recording anything else.
I have other external microphones with cable and 3-fold price only for the microphone: wireless is the technical quality hardly any different - the gain in comfort is enormous!
mfG Anton Gabriel