Condition: New, Never used, open package; Reason Selling: child grew up; Details about the item: Bluetooth connectivity; Rechargeable. Mean Attenuation at 500 Hz - 25.7dB. Mean Attenuation at 1000 Hz - 35.2dB; Headband is adjustable to grow with baby; Lightweight design is comfy for child to wear; Class 4 sound defence grading--provides full protection from loud noises; Features: Two Sizes for perfect fit (infant ages 0-2y and kids ages 3+y); Industry leading Protection - the best noise reduction available for kids; Durable and Safe; Able Play rated for children with special needs; Comfortable pads and headbands; Lightweight and portable;