About this item Volume Protection - Children's headphones feature three-stage safe volume settings at 74/85/94dB to protect hearing health: 74dB mode is suitable for ages 3-6, 85dB is ideal for school-age children, and 94dB requires parental supervision (press and hold for 2 seconds to switch); combination key lock to prevent accidental touch. Bluetooth 5.4 HD Sound Quality - Wireless Bluetooth + wired dual connection cater to children's needs: Bluetooth 5.4 ensures a stable connection for online classes and cartoons (uninterrupted connection within 15 meters), and plug-in mode maintains volume limit (exclusive patent). Equipped with a 40mm high-fidelity speaker, online class voice clarity is increased by 50%. Comfortable to Wear All Day - Folding headphones designed specifically for children include comfortable earmuffs (available in 3 sizes) and a 4-speed retractable headband (suitable for head circumferences of 3-16 years old); lightweight design enhances comfort. 68 Hours + Long Ba