About this item Volume Protection - These children's headphones utilize a three-stage safe volume setting at 74dB, 85dB, and 94dB, providing one-click protection for hearing health. The 74dB mode is suitable for children aged 3-6 years, 85dB is designed for school-age children, and 94dB requires parental supervision (press and hold for 2 seconds to switch); the combination key lock prevents accidental touches. Bluetooth 5.4 HD Sound Quality - Featuring wireless Bluetooth and wired dual connection, these headphones are tailored for children's usage scenarios. 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 clarity by 50%. Comfortable to Wear All Day - Designed with children in mind, these folding headphones feature comfortable earmuffs (available in 3 sizes) and a 4-speed retractable headband (s