This is the popular "ACEFIT NEO" series from ACEFAST. It's practically unused, having only been opened for a functionality check. These are open-ear headphones that don't block your ears, allowing you to enjoy music and calls while still hearing your surroundings. This design provides peace of mind, making them ideal for commuting, going to school, and sports activities like running and the gym. The lightweight and soft silicone ear hooks gently fit your ears and won't cause pain even after extended wear. They feature stable Bluetooth 5.4 connectivity and a high-quality microphone for clear calls. Key Features: * Open-ear design for a natural fit * Bluetooth 5.4 / Automatic pairing * ENC noise-canceling microphone * Approximately 7 hours of continuous playback (up to 28 hours with the charging case) * IP54 waterproof / Touch controls / Dual-device connection Included: Main unit, charging case, USB cable, instruction manual (Japanese) * There are minor scratches on the outer box, but the contents are in excellent condition. Recommended for those looking for a like-new product. Get yours quickly!