Headphones for children, Bluetooth children's headphones with 85 dB volume limitation, lightweight children's headphones with adjustable - Walmart.com
Here's what you need to know about headphone specifications - CNET
Kid Odyssey Kids Bluetooth Headphones Cat Over Ear with 85dB/94dB Volume Limited, LED Light Up Wireless Headphones, Built-in Mic Headphones for School Airplane,Pink Blue - Walmart.com
I accidentally had my earbuds at full volume. Is it possible that my hearing got damaged? - Quora
Headphone Volume - Are Your Headphones Safe or Too Loud?