Discover an amazing sound experience, The T-phox U13 headphones are revolutionary in-ear headphones that set a new standard in the audio experience. Equipped with the latest Bluetooth 5.3 feature, these headphones enable wireless, smooth audio transmission of unprecedented quality. Their portable case, already known to us for its unusual oval shape, not only contains a built-in battery for charging, but also ensures that the headphones are safely stored in a pocket, bag or backpack.