★ Mercari Delivery ★ Anonymous Delivery ★ Shipping Included ★ Shipped in the original box ★ Size can be adjusted, but it's a good size for people with smaller heads. ★ It's free size, but it might be a little too tight for people with larger heads. ★ Purchased on Amazon last month for 3,500 yen. ★ I gave it to my family as a gift, but they didn't use it (never used it), so I'm selling it to someone who wants it. This is **LUCADIA's soundproof headphone type (earmuff type)** that significantly reduces surrounding noise just by wearing it. It's not headphones for listening to music, but soundproofing equipment specifically designed to "block out sound" and "create a quiet environment." ⸻ Product Features (expressions that are strong for search) • Headphone-type physical soundproofing/sound insulation structure • Designed to cover the entire ear to reduce everyday sounds and environmental noise • No power required, no charging required, ready to use immediately • Comes with cushions for comfortable long-term wear • Simple structure with low risk of failure ※ This is a "reliable sound insulation type" similar to earmuffs for construction sites. ⸻ Recommended uses (applications = search keywords) • Concentrated work / study / reading • Noise対策 for sleeping • Construction noise, everyday noise, and conversation noise対策 • Hearing sensitivity / HSP対策 • Airplane / train ⸻ Condition • New, unused ※ Please check the photos for the condition ⸻ Important Notes (to prevent trouble) • No music playback function • It's not completely silent, but it reduces sound to a practical level • The effect varies depending on the usage environment