The Green Lion GK-600 Kids Wireless Headphones are just right for young listeners. Made from rugged PP + ABS material, the headphones come with 40mm speakers producing rich and clear sound. They feature Bluetooth V 5.4 to make sure your connection will be stable and transmit up to 10 meters away from the headphones. With child-safe sound technology, these headphones will protect children's ears from loudness at high settings. The large 200mAh battery capacity provides 20 hours of music time and up to 180 days of standby. The cushioned ear pads allow comfortable wear during intense listening, great for everyday use. A Type-C charging port is provided to facilitate rapid charging within 2 hours. This elegant design is what Green Lion GK-600 is all about: providing excellent sound, safety, and comfort for kids. Great for your kid's music, Games, and learning. Specification Material: PP + ABS Battery: 200mAh Bluetooth: V5.4 Transmission Range: 10m Speaker: 40mm Impedance: 32±4? Sensitivity: 100±10% Frequency: 20Hz-20kHz Charging Port: Type-C Charging Time: 2H Playtime: 20H Standby Time: 180 Days SKU: GNK600KDHPBL | GNK600KDHPPK GTIN: 9904781940696 | 9904781940764 Features Padded Ear Cushions V5.4 Bluetooth Child-Safe Sound