These wireless headphones feature a built-in microphone, two different sound volume settings of 85dB and 95dB for perfect volume adjustment in any environment. The built-in 500mAh battery provides up to 24 hours of battery life Fully charged in about 2 hours via USB Type-C charging cable Working distance of 10 meters Suitable for children aged 3 and up Expandable adjuster for a flexible custom fit for any head shape Lightweight pivoting design durable, foldable and flexible and comfortable when in use Additional 3.5mm audio sharing cable included Two different sound safe volume settings of 85 dB and 95 dB for the perfect volume setting in any environment. Built-in 500mAh battery provides up to 24 hours of play time Fully charged in approximately 2 hours by Type-C USB charging cable A working distance of 10 metres