Headsets, Headphones, Handsfree - mobile phones and other equipment
MRLG pinout

Warning! Control buttons are NOT standard. For information about control buttons take a look to another pinout


Pin Pin
1 MIC Mic +
2 R_SPKR Right audio speaker
3 L_SPKR Left audio speaker
4 GND Common ground


Compatibility list not tested!

4 pin 3.5mm (2.5mm) plug connector layout
4 pin 3.5mm (2.5mm) plug connector
at the 2.5 mm plug
According to 6 reports in our database (4 positive and 1 negative) this pinout should be correct.

Is this pinout
MRLG 4-pole 2.5mm headset connector visual pinout:
MRLG 4-pole 2.5mm headset connector diagram
click to enlarge
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