These wireless headphones were designed with children in mind and are suitable for children aged 3 and connect to all Bluetooth enabled devices. Built-in 500mAh battery provides up to 24 hours of play time and the headphones will be fully charged in approximately 2 hours by Type-C USB charging cable (included). These headphones have a working distance of 10 metres. They may also be used in wired mode for when Bluetooth isn't available and there is also a splitter/sharing cable included so your friend can also listen to the same music at the same time Compatible with all devices using a 3.5mm jack. There are two volume settings: 85 dB which is suitable for children aged 3-7 years; and 95dB. Just just toggle the switch on the earcup and boost the sound for times when you need a lounder setting such as travelling in cars, trains and aeroplanes. The flexible design features a padded, adjustable headband for a custom fit. The earcups also twist to fold flat and inwards for easy storage in your desk or bag.