Lightweight and comfortable: The headset weighs only 12 grams and features an ear-hook design that is stable and won't slip off. Even after long hours of use, you will not feel fatigue. FLEXIBLE ROTATION: The headphone receiver can be rotated 270°, which can be adjusted to the ideal angle according to your needs, suitable for both left and right ears. Equipped with Bluetooth 5.3: Featuring the Bluetooth version 5.4 standard for faster and more stable communication, with easy pairing and a stable connection within a range of 10 meters. CVC6.0 Noise Cancellation Technology: This product supports CVC6.0 noise cancellation technology. Whether your smartphone is in your hand, pocket or bag, and you can talk clearly in noisy environments, you can enjoy stable sound without distortion or noise, ensuring the best listening experience. Hands-free calling: perfect for business environments or when you need to stay in touch with your surroundings at work, allowing you to take notes or perform tasks while on a call. Bluetooth Headset Bluetooth 5.4 Wireless Headset In-Ear Single Ear High-quality Built-in Microphone 180°Rotation Left and Right Ear Universal Ultra Long Standby （Gray）