The Green Lion Gk-400 Kids Wireless Headphone is designed for kids to listen to music without damaging their hearing system. This headphone has about 20 hours of playing time and only takes less than 2 hours to charge. Due to the Bluetooth v5.3 used, the Green Lion Headphone can stay connected within a range of 10 meters. Lastly, the Green Lion GK-400 Kids Wireless Headphone has different light effects, all appealing to kids.