GU Craftsman 3.5mm Stereo Male to 4.4mm Balanced Female Portable Headphone Adapter Cable 6N Single Crystal Silver Headphone Jack Conversion Cable for Audio Players with 3.5mm Port High-Quality Materials: The cable is made of 7N single crystal copper + 7N silver-plated single crystal copper mixed braided wire, and the cable length is approximately 6cm. A more durable design allows the adapter to withstand thousands of bending tests. Each conductor is custom annealed to achieve an especially soft state. The cable sheath is made of durable, non-polluting PVC with excellent colorfastness. Lightweight and Portable: Adopting a lightweight design, you can carry and use our adapter anytime, anywhere. It feels skin-friendly, is easy to store, and is not prone to tangling. Excellent Sound Quality: This cable has strong low-frequency control, high analytical ability, excellent sound density and texture, a wide sound field and excellent airiness, and also has good mid-high frequency expression, with strong sound penetration, bright and powerful sound, allowing you to enjoy impressive musical elements. Operation has been confirmed with NW-A306. I am selling this as part of a decluttering effort due to the purchase of a higher-end model. Thank you for your consideration.