Purchased as a spare and stored unused. Opened once for photography. Please refrain from price negotiations. The following is product information: Brand: Sony (SONY) Color: Gold Ear Placement: In-Ear Headphones Type: Sealed Dynamic Noise Control: None Frequency Response: 8000 Hz Wireless earphones with a long-life battery that allows for up to 15 hours of playback. Designed for stability + comfortable fit with a housing shape that conforms to the ear. Flat cable design makes it easy to carry without tangling, even when rolled up. Equipped with a high-power neodymium magnet that reproduces clear mid-high frequencies and deep, powerful bass. Supports high-quality AAC for wireless listening with less sound quality degradation. Easy operation of iPhone/smartphone players with buttons on the neckband. The housing structure with smaller air vents is designed to prevent sound leakage. Supported BT codecs: SBC/AAC Accessories: Hybrid ear pieces S/M/L (each 2), USB Type-C cable (approx. 20cm), warranty card, instruction manual, reference guide Battery life (continuous audio playback time): Up to 15 hours / Battery life (continuous talk time): Up to 15 hours / Battery life (standby time): Up to 200 hours