1、Designed with a neck band, it can be hung on the neck when not in use. 2、25dB NRR, effectively reducing noise interference, reusable and without degrading noise reduction performance. 3、With plastic box, it can be stored in the box when it is not used for a long time, so it is not easy to lose. The square box has a round hole that can be attached to the key ring for easy carrying. 4、Comfortable and safe TPE material, no irritation to the skin.Used to improve sleep, concentration, and protection of hearing. 5、It is a good helper to avoid noise interference in your home, bedroom, self-study classroom, travel by plane, factory, construction site, downtown area, etc. Features: Designed with a neck band, it can be hung on the neck when not in use. 25dB NRR, effectively reducing noise interference, reusable and without degrading noise reduction performance. With plastic box, it can be stored in the box when it is not used for a long time, so it is not easy to lose. The square box has a round hole that can be attached to the key ring for easy carrying. Comfortable and safe TPE material, no irritation to the skin. Used to improve sleep, concentration, and protection of hearing. It is a good helper to avoid noise interference in your home, bedroom, self-study classroom, travel by plane, factory, construction site, downtown area, etc. It is a good partner for your healthy life, and it is also a must product for you to watch F1 competition. Specification: Condition: 100% Brand New Material: TPE Color: Blue SNR: 29 dB NRR: 25 dB Package List: 1 * Pair of Earplugs