Works with 4.4mm jack equipment, 4.4mm male to 3.5mm female adapter, allows you to connect headphones to o devices. Made of oxygen-free copper wire, ensuring clear o signal transmission, depth, and resolution. Reduces the possibility of wire oxidation and accurately restores music details. Gold-plated pure adapter helps protect sound transmission and resolution from interference, delivering high-quality o performance. Compact and portable design, compatible with earphones, headphones, and home o equipment such as amplifiers, mixing consoles, home theater systems, AV receivers, and karaoke systems. Available with straight or bent plug; grip treads enable easy plugging and unplugging. Material: tinned copper wire Color: black Package Contents: 1 x Adapter o Cable Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement error allowed is +/- 1-3cm.