Features: 1. Food Grade Material: Safe and soft food grade material without any sharp corner protects your kids from any scratch injury. Environmentally sustainable, safe and non-toxic materials have been selected for childrens' comfort and health. 2. Volume Controlled Technology: Built-in volume-controlled technology that ensures the sound is within levels recommended safe for young children's eardrums and inner ear at 80-85dB. 3. Durable and Twistable Band: PP headphone beam is strong and durable but flexible enough to bend in any direction to withstand rough play of kids. 4. Adjustable Band Design: The extendable band is suitable for children of a wide variety of ages. Its solid Bayonet-mount design can be frequently extended or retracted while maintaining excellent flexibility and fixity. 5. Wide Compatibility: Standard 3.5mm audio jack suitable for most of the Android, iOS Smartphones, PC and Tablets, etc. Specification: Speaker Dimension: 30mm Sensitivity: 85±3db Impedance: 32Ω Frequency Response: 20-20000Hz Cable Length: 1.2m Package Included: 1 * Kid Headphone 1 * User Manual