Connect RX to the iPhone via an Apple-certified Lightning to 3.5mm TRRS cable.
Connect RX to the Android phone via a Type-C to 3.5mm TRRS cable. For Samsung phones, make sure to use a Samsung-approved Type-C to 3.5mm TRRS cable.
Connect RX to the Android phone’s 3.5mm TRRS port via the 3.5mm TRRS to 3.5mm TRS cable.
Note:
You may adjust Lark M1’s volume by using the volume button on the side of RX to set the volume to the right level (1~3 levels).