Featuring the V5.3 Bluetooth® technology with built-in microphone, these wireless headphones are - Built-in 500mAh battery provides up to 50 hours of play time without LED or 12 hours of play time with LED - Fully charged in approximately 2 hours by Type-C USB charging cable - A working distance of 10 metres - 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 mobile