About this item Volume Protection - These children's headphones feature a three-stage safe volume setting of 74/85/94dB for hearing health, with a one-click protection feature: 74dB mode is suitable for ages 3-6, 85dB is recommended for school-age children, and 94dB requires supervision (press and hold for 2 seconds to switch); a combination key lock prevents accidental touch. Bluetooth 5.4 HD Sound Quality - Wireless Bluetooth and wired dual connection designed for children's use cases: Bluetooth 5.4 ensures a stable connection for online classes and cartoons (uninterrupted connection within 15 meters), while the plug-in mode maintains the volume limit (exclusive patent). The 40mm high-fidelity speaker increases online class voice clarity by 50%. Comfortable to Wear All Day - Folding headphones designed for children with comfortable earmuffs available in three sizes; a 4-speed retractable headband suitable for head circumferences of ages 3-16; lightweight body for extended wear. 68 Ho