About this item Work for 3.5mm jack equipment, connect 3.5mm Male to 6.35mm Female (1/8' male to 1/4' female adapter), allows you to connect headphones to audio devices. Made of pure copper, ensuring a longer service life compared to plastic and gold plating. Please ensure that the 3.5mm port is fully inserted. Pure copper connectors resist corrosion and ensure minimal signal loss. Handy and portable, widely compatible with earphones, headphones, karaoke systems, and more. Dimensions: 3.66 x 2.24 x 0.35 inches.