Easy to switch your 2.5mm jack to 3.5mm standard stereo jack fits your headphone Features : This adaptor is perfect for converting 2.5mm female earphone plug jack to 3.5mm male earphone jack plug convertor Applicable to connection of audio device Compact design for easy carrying. Connector A : 1 X 3.5mm Male Connector B : 1 X 2.5mm Female Color : Black