XO X39 are Bluetooth 5.3 TWS in-ear headphones that provide high sound quality and complete freedom of use. Thanks to TWS (True Wireless Stereo) technology, both earbuds connect wirelessly, creating an excellent stereo set. The portable charging case with a built-in battery not only allows for convenient charging but also safe storage of the earbuds in a pocket, bag, or backpack. XO X39 is the perfect solution for users of smartphones, computers, notebooks, and tablets that support Bluetooth technology. They are compatible with both Android and iOS systems, allowing for seamless connection with multiple devices. The built-in microphone enables high-quality voice calls. The working time on a full charge is approximately 210 minutes, depending on the volume level, thanks to energy-saving Bluetooth 5.3 technology.