85dB Safe Volume Limit. EarFun S1 kids headphones are specially designed for kids, the volume is limited to a safe sound level of 85dB to protect children's hearing. This effectively reduces loudness while still allowing every sound detail to be heard clearly. Kids-friendly Materials & Comfort Fit. Certified with CPC safety standards and constructed from kids-friendly materials, the wired kids headphones feature soft yet sturdy earcaps, and 9-level adjustable headbands can fit different head shapes, providing a comfortable experience for all-day wearing. HD Stereo Sound. Equipped with high-quality 40mm drivers and professional EarFun sound tuning, EarFun Kids Headphones deliver distortion-free sound. Kids can enjoy clear mid and high frequencies along with strong bass in educational videos, online courses, music, entertainment videos, and audiobooks. Ultra Lightweight & Foldable Design. With the 90-degree rotatable and foldable design with 118g weight, the on