Feature:1. [ Can Hear] After using this headset, can hear the sound of the guitar, which can help you learn music and prevent disturbing people. 2. [ Quality] The loss of the earphones to the sound quality is small, and the sound transmitted is pure, bright and clear. 3. [Retractable Design] The head size of the earphones can be adjusted and stretched, without pressing the head, and it not be uncomfortable to wear for a long time. 4. [Easy to Store] The earphones are foldable and can be folded for storage when not in use without taking up space. 5. [ABS Material] The earphones use ABS material as the shell, making the earphones and more convenient to wear and carry. Specification: Item Type: Guitar headphone Applicable Type: Acoustic guitar, electric guitar are suitable Horn Inner Diameter: . 40mm / 1.6in Impedance: 32Ω Frequency Response: 20Hz-20000Hz Wire Specifications: Diameter: . 3.0mm / 0.1in Length: . 2.0m / 6.6ft Plug size: 3.5mm pin Material: ABS colour: black Package Contents: 2 x Guitar Headphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.