Features: Open-Ear Design & Bluetooth-Connectivity: These wireless Bluetooth-headphones feature an open-ear design, allowing you to stay aware of your surroundings while enjoying music, making them ideal for outdoor sports like hiking, cycling, or running. Advanced Air Conduction Technology: The open-ear air conduction headphones deliver clear sound quality without inserting into your ears, ensuring maximum comfort during extended wear for gym workouts, sports, and other intense physical activities. Type-C Charging & Low-Latency Performance: Equipped with efficient Type-C charging and low-latency technology, these earphones provide a stable connection and seamless audio sync, perfect for gaming and music without annoying delays. Comfortable Wear & Noise Reduction: Engineered for comfort, these noise reduction earphones are lightweight and ergonomically designed to stay secure during vigorous movements like running and cycling, while minimizing ambient noise interference. Superior Sound For Active Lifestyles: Designed for sports running, hiking, cycling, and outdoor sports, these headphones offer clear sound quality and effective noise reduction, enhancing your music experience without compromising safety or comfort. Specifications: Material: Plastic Size: VV4: 11.5*13.4cm, VV9: 11.2*3.5cm Charging port: Type C Voltage: 3.2–4.25 V Bluetooth-Version: 5.3 Notes: Please allow slightly errors due to manual measurement and different monitors. Include: 1*Wireless Bluetooth-compatible Headphones 1*Manual 1*Charging cable