Not all headsets are the same. We have tested our hardware recommendations specifically for indoor and outdoor voice recording with smatrix.
Wired, monaural (one earpiece) headset with USB connection
Wireless bone conduction headset with digital noise cancellation
We would like to advise against using smatrix without a headset, as the recording via the internal microphone of the devices is not sufficient for flawless speech recognition.
Headsets can be connected to your device via a USB-C cable as well as via Bluetooth. smatrix supports both connection types. It is less recommended to use headsets with 3.5 mm jack plugs, since these plugs move in the jack and can cause crackling noises.