The DJI Mic Series Mobile Receiver easily connects to your smartphone [1] via its USB-C Plug or the DJI Mic Series Mobile Receiver Adapter (USB-C to Lightning) [2]. Just plug and play! It supports up to two transmitters at once, so you can pair two DJI Mic Mini transmitters, or any two transmitters in combination from DJI Mic Mini, Mic 2, and Mic 3 [3]. The Noise Cancellation Mode Switch lets you quickly switch between three noise cancellation levels [4]: Off (O), Basic (L), and Strong (H).