This is the Anker Soundcore AeroFit. It is working properly. I purchased it in 2025 and have used it about 2-3 times. The product includes only the main unit. Please forgive any minor imperfections as it is managed by an individual. Product Features ● Open-ear design that doesn't block your ears: You can do housework or run while listening to the surrounding sounds, reducing the fatigue and stuffiness unique to earphones. ● Ultra-lightweight design for comfort: With an ultra-lightweight design of approximately 8.5g and an ergonomic design, it provides a comfortable fit even for long hours of use. ● Up to 42 hours of long playback: The earphones themselves can play for up to 11 hours on a full charge, and up to 42 hours with the charging case. Also, a 10-minute charge provides about 4 hours of playback. ● Perfect for everyday use: Supports various functions such as multi-point connection that can connect to two devices simultaneously, clear calls with 4 microphones and AI, and IPX7 waterproof standard. You can use it in all kinds of everyday situations, from sports to meetings. ● Product contents: Main unit, charging case Product Specifications ● Wireless communication technology: Bluetooth ● Material: Plastic ● Compatible devices: Smartphone, PC, and other Bluetooth-enabled devices ● Item weight: 64.6 grams ● Manufacturer: Anker ● Manufacturer model number: A3872 ● Material: Plastic ● Product size: 9.1 x 5.3 x 2.3 cm; 64.6 g ● IP57 dustproof and waterproof standard ● Up to 42 hours of playback ● Multi-point connection ● Compliant with PSE technical standards ● Disclaimer This product is sold as is. Returns and claims are not accepted for any reason. Please confirm the contents and purchase at your own risk. Open-ear Canal Bone conduction Bluetooth Anker Soundcore AeroFit A3872