About this item [ Bluetooth 5.3 ] Kids wireless headphones feature upgraded Bluetooth 5.3 connectivity technology for faster and more stable connections. With 40MM large coil speaker and built-in microphone, children can easily enjoy HD sound quality and calls. [ Comfortable to Wear ] Ergonomic and adjustable design ensures a perfect fit. Soft ear muffs and headwear pads provide comfort for long-term wear. [ Wireless & Wired 2 in 1 ] Equipped with Bluetooth wireless mode and wired mode, parents dont have to choose between wireless or wired headphones. A 2-in-1 option for boys and girls is a great choice. (Includes a 3.5mm audio cable.) [ Foldable & Adjustable ] Collapsible and adjustable design suitable for children or teenagers over 3 years old. Can be adjusted with 5 sections of expansion and contraction, the ear cup diameter is 2.76 inches. Convenient for school and travel, kids headphones are easy to store and won't burden children. [ Wide Compatibility ] This Bluetooth wireless he