Thank you for viewing. I will pack it carefully and ship it in simple packaging. This product is ☆彡 unused ☆彡. There may be minor scratches, scuffs, or dirt. The outer box has dirt and damage. Please judge the product condition and size from the photos. Please consider only if you understand. *Please also read the profile (^^) - Brand: Free Sound - Model Name: Duo - Bluetooth Version: 4.2 - Charging Method: USB charging - Frequency Response: 100Hz〜20kHz - Impedance: 16Ω - Maximum Output: 20mW - Continuous Playback Time: Approximately 90 minutes - Driver Size: 8mm 【High Sound Quality】 Equipped with an 8mm driver, achieving a wide frequency response of 100Hz〜20kHz. Improves the quality of music and calls. 【Comfortable to Use】 Lightweight design, making it less stressful to use for long periods. Wireless freedom is ideal for everyday life. 【Convenient Charging】 Supports USB charging, making it easy to charge. Bluetooth 4.2 provides a stable connection.