XO X23 is in-ear Bluetooth 5.3 TWS earphones with a charging box. The earphones support TWS (True Wireless Stereo) technology, allowing both headphones to connect to each other and create a wireless stereo set. The portable box with a built-in battery not only charges the earphones but also safely stores them in your pocket, bag, or backpack. Free your hands and enjoy music or internet radio while working, walking, training, or driving. The XO X23 TWS earphones are an ideal solution for users of smartphones, computers, notebooks, tablets, and other devices that support Bluetooth technology. They are compatible with most Android and iOS devices. The earphones also feature a microphone for easy voice calls. The duration of calls or listening to music on a full charge is about 240 minutes, depending on the volume level, thanks to the energy-saving Bluetooth 5.3 technology.