HEDD Audio HEDDphone D1 Open-Back Headphones (Open Box) 2.5mm male 1kHz/16bit Software upgrade Local storage

1kHz/16bit Software upgrade Local storage upgrade + TF card local upgrade + OTA push upgrade Local storage upgrade + TF card local upgrade + OTA push upgrade TF card local upgrade/OTA push upgrade Clock function Yes Yes Yes Font size setting Yes Yes Yes Third party APP Factory built-in:FiiO Music/ ES file browser/ Chrome browser

it can accurately rebuild audio lost during digital compression for a full fidelity experience

but it is important

with the right housing also incorporating mother-of-pearl

HEDD Audio HEDDphone D1 Open-Back Headphones (Open Box) 2.5mm male 1kHz/16bit Software upgrade Local storageThe first of its kind. Precision without compromise. A new HEDDphone built for true listening, the D1 delivers the clarity, realism, and tonal integrity of a reference monitor. Every note feels balanced and immediate, details are revealed without fatigue, and the carefully engineered fit ensures lasting comfort for extended sessions. The D1 is the worlds first dynamic headphone with a Thin Ply Carbon Diaphragm (TPCD). Developed with Swedish company