Sony MDR-222KD Children's Headphones w/ Over-The-Head Design (Black) for School, Home & Travel (Certified Refurbished) Comes in brown box packaging. Includes headphones and operating instructions. Frequency Response: 14-20,000Hz/ Impedance: 71 ohms at 1kHz Cord Length: 3.9' Lightweight over-the-head design Fits children 8 years and up