About this item Volume Protection - These children's headphones feature a three-stage safe volume control at 74/85/94dB to ensure hearing health. The 74dB mode is suitable for ages 3-6, 85dB is ideal for school-age children, and 94dB requires parental supervision (hold for 2 seconds to switch); a combination key lock prevents accidental touches. Bluetooth 5.4 HD Sound Quality - Designed for children's use scenarios, these headphones support both wireless Bluetooth and wired connections. The Bluetooth 5.4 ensures a stable connection for online classes and cartoons (uninterrupted within a 15-meter range), and the plug-in mode maintains the volume limit (exclusive patent). The 40mm high-fidelity speaker improves online class voice clarity by 50%. Comfortable to Wear All Day - These folding headphones are specifically designed for children, featuring comfortable earmuffs (available in 3 sizes) and a 4-speed adjustable headband suitable for head circumferences of ages 3-16; they have a ligh