Mevo MV1-01A-BL Get Started page 152

The key factor determining if your audio source is compatible with the 3.5mm port on mobile devices
is the type of plug it has. It must exactly match the form factor seen in recent versions of the Apple
earbuds with the built-in microphone, as pictured here:
The red arrows above are pointing to three chrome rings and a chrome tip separated by three much
thinner rings. This is referred to as a TRRS TRRS plug (tip-ring-ring-sleeve). This is the correct type of audio
input that iOS devices can accept.
Mobile devices cannot input audio with plugs that only have 2 or 3 chrome rings, such as those
pictured below:
A TS (tip-sleeve) and TRS (tip-ring-sleeve) plug. These are not supported as audio inputs.
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