No Charge Required: Wherever your child is, it is always with him or her. It features a battery-free design for uninterrupted playback Foldable-Lightweight-Portable: Child-friendly design makes headphones easy to fold and suitable for storage in backpacks, school desks, or suitcases, and can also be carried lightly for school, travel, camping, hiking, and other outdoor activities Designed for Maximum Comfort: Perfectly fit with ears, Adjustable Headband, Memory Foam Padding, Soft Protein Earpads, Sharable Connection In-line control and volume limiting, hands-free talking with a mic Easy Sharing: No splitter needed, you can connect another headphone directly, and share music or movies with friends Specifications: Model: E92V Horn Diameter: 40mm Impedance: 32Ω Frequency Response: 20-20000HZ Plug Type: 3.5mm Rated power: 3mW Maximum power: 5mW dB value: ≤85 dB Sensitivity: 95±3db Cable length: 120(±5)cm