Compatible with Geekria Male to Female Headphone Plug Conversion Audio to Male to Female Plug Adapter Gold Plated 3.5mm (1/8'') 2.5mm Adapter, Plug,

This audio adapter converts 3.5mm plug to 2.5mm plug. Connectors: 3.5mm 3-pole male, 2.5mm standard 4-pole female. Easy to use and provides optimal signal transmission. 2.5mm balanced cable headphones, earphones, 3.5mm jack stereo PDA, IPAQ, smartphone, MP3, MP4, audio, audio, video player equipment. It can be used for etc. [Size] 4.6 X 0.6 cm (1.81 X 0.24 inch) [Package contents] Conversion plug x 1 piece