Lighting Microphone Headphone Splitter Adapter ,Upgrade 3 in 1 Dual 3.5mm Microphone Audio Jack and Charging Aux Adaptor Earphone Splitters Compatible with iPhone/iPad/Pro
bought at Amazon for $16.99
Bought this one for audio recording on my iPad. It has two separate lines, microphone and headphone. The microphone line is used for audio input. I connected this audio line to my mixer output. It works great.