4www.fritzing.orgAudio Jack (TRRS) 3.5mm2012-05-25audio jackmicrophonesoundAudio ConnectorRC-5325A [SMD]TRRS (4 pins)3.5 mmLUMBERG JEITA RC-5325ASmartphone audio jack with 4 pins (stereo plus microphone), based on the LUMBERG JEITA RC-5325ARING 1RING 2TIPSLEEVETIP