The Skullcandy Sesh Evo portable Bluetooth wireless earphones have a isolating ear-insert design. These iPod/cellphone-centric earphones /are intended for use with iPods, iPads, some other cell phones, as well as standard audio devices, and have a claimed reception range of around 33 feet and are intended for use with bluetooth enabled audio devices including cell phones, as well as standard audio devices The earphones have an inline microphone and inline remote with and integrated volume, music player function, and call connect/disconnect controls. Additional features include Has EQ mode that can be switched between three different tonal presets. Charging/carrying case has built-in rechargeable battery that the manufacturer claims can be used to recharge the earphone batteries a bit less than 4 times (to add an additional 19 hrs. for a total of 24 hrs. of playtime) between its own charges. Manufacturer claims water and dust resistance (IP55). Has power on/off, low power, and Bluetooth pairing voice announcements. Either earpiece can be used alone for one ear monitoring of Bluetooth streamed audio and telephone communications. Supports undisclosed digital voice assistants when used with devices products that have those features. Earphones also have a quick-charge feature, where 10 minutes of charging will provide 2 hours of audio playback. Bluetooth connected Apple mobile devices using iOS Version 5 and above will show the battery level. Has built in Tile tracker feature; once they are registered with Tile if the earpieces are lost they can be located via the free Tile app download for Apple and Android mobile devices. The Sesh Evo comes with three pairs of ear pieces in various types and sizes, usb-a to usb-c charging cable, charging cradle/recharger battery/carrying case and is covered by a 24-month parts/24-month labor warranty.