Thank you for viewing my listing from among many others. This is a listing for a brand new, unused Bluetooth headset wireless earphone with a built-in microphone, for both left and right ears. The model number is YYK525. The outer box has been opened once for photography, but the photos were taken while wearing gloves, so the item has not been touched. As this is a foreign product, the instruction manual is in English, but you should be able to find usage instructions by searching for YYK525 on the internet. This item was a company prize, so the purchase date is unknown, but it is a brand new, unused item. How about taking this opportunity? Notes: ※Please purchase with the understanding that this is a foreign-made product. ※The outer box has some minor damage. ※It will be shipped via Nekopos. ◎You can view a list of my listings with the following hashtag (*^▽^*) #OldMan1 Product Specifications: 1. Waterproof: The wireless business headset has passed the IPX7 life-level waterproof and nano-sweat resistance tests. 2. Mobile Coil: The wireless hands-free earphones have a 14mm large mobile coil, improving the dynamic performance of the bass and making it sound clearer. 3. Rotatable Ear Hook: The ear hook of the headset can rotate 270 degrees, allowing you to freely switch between the left and right ears and adjust to suit the wearing habits of different people. 4. Smart Chip: The wireless business headset uses a new generation 5.1 smart chip, which can effectively isolate noise and maintain a continuous flow of calls. 5. Automatic Pairing: The headset successfully pairs the first time, and automatically pairs after removing the headset. It is lightweight and fits securely, so you don't have to worry about the headset falling off. Specifications: Item Type: Wireless Earphones Material: ABS Product Size: Approx. 10x5x2cm / 3.9x2.0x0.8in Wireless Frequency: 2.402GHZ-2.480GHZ Battery Capacity: 100 MA Charging Voltage/Current: 5V / 1A Battery Type: Polymer Battery Congratulations on joining the company, congratulations on entering school