NIKEN Sound Type Shuonki Be Used for 2 Hours and 25 Hours On a Audio USB Weight Left and Right Set Charging Case Gift 04 Collector, In-Ear [Japanese

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. [Easy operation & automatic start function] Just put the NK04 sound collector in your ear and it will automatically turn on after about 4 to 5 seconds. It is also equipped with a touch panel volume adjustment function that enables smooth operation, allowing you to adjust the volume with one touch. Especially suitable for those who value convenience. [Long-term use and short charging time] The NK04 sound collector can be used continuously for up to 25 hours with just 2 hours of charging. It has a high durability that can withstand long-term use in daily life or when going out. It's perfect for people who go out and travel a lot, and reduces the worry of running out of battery. [Comfortable design for both left and right ears] Designed to fit both left and right ears, it fits perfectly to the shape of your ears. Like regular earphones, you can wear them without any discomfort even if you are wearing a mask or glasses. Furthermore, the simple yet fashionable design can be used in any situation. [Ergonomic design and customizable ear tips] The ergonomic design will prevent your ears from hurting even when worn for a long time. In addition, three types of ear tips, large, medium and small, are included, allowing you to choose according to the size and shape of your ears, providing a comfortable fit for more people. By finding the right size for your ears, you will feel more stable when wearing them. [Portable charging case allows you to charge at any time] Charging will start automatically just by storing it in the charging case. The case itself can be charged up to 4 times on a single full charge, so you can use it with confidence even when going out for long periods of time or traveling. No need for cumbersome cable management and easy to carry. [Accessories] Dedicated charging case, earpieces (S x 2, M x 2, L x 2), Type-C USB cable, cleaning brush, instruction manual, warranty (1 year from purchase) [About feedback] Howling occurs when there is a gap in the ear canal. This can be prevented by using ear plugs that fit your ear canal. 1. Before using, please select ear plugs that fit your ear canal. 2. Please push firmly into the ear canal so that there is no gap. 3. Please turn off the power and minimize the volume before installing. 4. After installing, try increasing the volume gradually. 5. Volume 3 is recommended for those who are new to sound collectors. [1 year warranty] Comes with a 1 year warranty from the date of purchase. If you have any concerns during use, please feel free to contact us. This product is a sound collector. This is not a hearing aid, which is a medical device.