4 Pole Audio Jack Conversion Board
This is an audio jack for 4 poles φ3.5 mm mini plugs.
Silk included for easy identification of the connection between audio plugs and terminals.
Recommended for developing devices that support headphones with microphone or headphones with remote control.
The L and R pole for audio has a switch that works when plugging in.
It can also be used as a 3-pole mini plug with a φ0.14 inch (3.