New, Unused, Free Shipping (Simple Packaging, Mail Delivery) Price is not negotiable. 【Bluetooth 5.3: Excellent Compatibility】 The latest Bluetooth 5.3 achieves 2x faster transmission speed and more stable connection than previous versions, without signal interference, data transmission loss, or music dropouts. This product is also widely compatible with Bluetooth mobile phones and systems, and can connect to two devices simultaneously, even with different operating systems. 【Ultra-Lightweight & Comfortable, 360° Rotation】 This product weighs only 13g, making it lightweight and less tiring to wear. It features a 360° rotatable ear hook and a 270° rotatable microphone. The ergonomic ear hook is designed with a streamlined shape that follows the contours of the ear, providing a comfortable fit. 【Noise Reduction for Clear Calls】 Equipped with a noise-canceling function, it significantly cuts out noise and surrounding sounds during calls, making voices easier to hear and providing a comfortable calling experience even in noisy environments. 【Large Capacity Battery】 Despite its compact size, the main unit has a built-in 60mAh battery, allowing for up to 10 hours of continuous use. Recommended for those with long commutes or those who engage in long-duration sports training. Wireless Earphones Bluetooth 5.3 + EDR, Ear-Hook Type, Single-Ear, Open-Ear, Allows Ambient Sound to be Heard, Canal Type, 360° Rotation, Compatible with Left and Right Ears, Built-in Microphone, Hands-Free, Noise Reduction, Clear Calls, HiFi High-Quality Sound, Ergonomic Fit, Comfortable Wear, 13g Ultra-Lightweight, Stable, Sports Use, Waterproof/Splashproof, Driving