The XO X33 are in-ear Bluetooth 5.3 TWS headphones with a charging case. The headphones support TWS (True Wireless Stereo) technology – both earbuds connect to create a wireless stereo set. The portable case with a built-in battery, in addition to the charging function, allows you to safely store the headphones in your pocket, bag, or backpack. Free your hands and listen to music or internet radio while working, walking, exercising, or driving. The XO X33 TWS headphones are ideal for users of smartphones, computers, notebooks, tablets, and other Bluetooth-enabled devices. They are compatible with most Android and iOS devices. The headphones also have a microphone, so you can easily make calls. Talk/listen to music time on a full charge is approximately 240 minutes (depending on volume level), thanks to energy-saving Bluetooth 5.3 technology. #13#10