Unused, only opened. Selling because it was different from what I expected. Amazon Price: ¥5,498 AULUMU A29 AirPods 4 Case, Geometric Design, Zinc Alloy Lock, Detachable Nylon Strap, Shockproof TPU, Reinforced Corner Protection, Case for AirPods 4th Generation (2024), Black 【Evolution of Geometric Design】Reconstructed the classic design of A09, with precise curves for a slimmer profile. Perfectly fits AirPods 4, maintaining a unique design while achieving a slim form that fits smoothly in your pocket. 【No Worries About Loss】The high-durability alloy lock clip securely fastens with a "click." Even when hanging upside down in a gym bag, it firmly holds AirPods 4 with a strong grip. 【Fusion of Materials】The combination of TPU, PC, and metal provides further impact resistance and strength. The contrasting beautiful textures created by the different materials are also attractive. 【Strap Revolution】The quick-release nylon strap rotates 360° and can be easily attached to cross-body bags, bicycle handlebars, belt loops, etc. 【Compatible Models】Exclusively for AirPods 4 (earphones and charging case not included). 【Not Compatible with Apple Watch Chargers】This product is compatible with general flat wireless chargers, but due to the structure, Apple Watch chargers with a recess in the center may not charge properly due to gaps. Please be aware of this.