CONAMBO k18 Wireless Headset I am selling this item because I have used it a few times after purchase, but I no longer plan to use it. I have tested it before listing it, and it works. I was able to use it with my smartphone (GALAXY) via Bluetooth connection. [Included Items] Main unit, case, ear tips (3), USB charging cable [Product Description] ★ Audio Performance: The K18 wireless earphones use a CVC8.0 noise-canceling microphone for calls and ENC single-microphone environmental noise reduction technology. It has two built-in microphones, with the primary microphone (active noise) providing stable and clear calls. It uses a highly sensitive acoustic microphone to collect ambient noise, and an internal processor calculates and neutralizes sound waves completely opposite to the noise in real-time, achieving noise cancellation. It blocks out car noise and everyday sounds, providing a quiet conversation environment. Even in noisy environments, you can hear each other's voices clearly and have comfortable conversations. You can enjoy stable and well-balanced high-quality sound. It is perfect for sports, commuting, going to school, and business situations. ★ Ultra-Long Battery Life: Up to 16 hours of talk time, 240 hours of standby time, and you can move up to 10m away. It is ideal for mobile professionals who frequently use their mobile phones for communication. If you're in a hurry, a 10-minute quick charge provides up to 60 minutes of talk time. Please note: The 16-hour battery life is for normal talk time only. When using the headset for calls, music, games, etc., it will last for about 8 hours. Also, since this is a Bluetooth headset specifically for calls, the battery consumption varies depending on the mobile phone. Please understand this. ★ Design Pursuing Comfortable Wear: Ergonomic triangular design with a 180-degree rotating ear hook and a 270-degree rotating flip boom arm. It is compatible with both left and right ears, and rigorous tests have been conducted on stability and comfort for various ear shapes, allowing you to concentrate on calls and wear it comfortably for long periods. Comfortable all day long.