Thank you for viewing. Product Features: The IN2UIT C501 is a high-quality headphone equipped with the unique electrostatic technology "Electrostatz." Its magnet-free construction reproduces clear and extended sound, unlike conventional dynamic types. With a playback frequency range of up to 35,000Hz, it supports high-resolution audio sources. Product Condition: New, unused (opened, not tested) Includes the main unit, cable, and outer box. Slight scratches on the outer box (see photos). Size and Specifications: Model Number: C501 Driver Type: Electrostatic (Electrostatz) Frequency Response: ~35,000Hz Color: Gold x Black Foldable and lightweight design Wired connection (integrated cable) Recommended Points: Achieves delicate and transparent sound quality with Electrostatz technology. Especially well-suited for vocals, classical music, and acoustic sounds. Lightweight and compact, foldable for easy portability. Stylish design with a luxurious gold and black color scheme. ※ Most items are received from others, so only power-on confirmation has been performed, and detailed operational checks have not been conducted. Items are sold as-is. Please understand the condition of the product before purchasing. As we are offering these at a low price, refunds and returns are not accepted.