These wireless headphones are with builtin microphone, Two different sound safe volume settings of 85 dB and 95 dB for the perfect volume setting in any environment. Builtin 500mAh battery provides up to 24 hours of play time Fully charged in approximately 2 hours by TypeC USB charging cable A working distance of 10 metres Suitable for children aged 3+ Extendable adjuster for customised flexible fit for any head shape Lightweight, durable, foldable, flexible swivel design and comfortable while in use Extra 3.5mm audio sharing cable included These headphones can be used with all your favourite devices i.e. use with iPads, ipods, Tablet, handheld games, learning devices, XBox, PS4, 2Ds XL and Nintendo switch* when wired mode, using a 3.5mm 3.5mm universal jack connector audio sharing cable included. *Note, all function buttons and mic are deactived when the headphones are wired mode.using 3.5mm universal jack cable all function buttons and mic are only work wehn the headphones are wireless mode only. For some of mobiles may not be able to use some or all functions depending on the specifications of the devices itself. Ensure that your device system is up to date.