The XO X40 are in-ear Bluetooth 5.3 TWS headphones that offer excellent sound quality and complete freedom of use. Thanks to TWS (True Wireless Stereo) technology, both earbuds connect wirelessly, creating a high-quality stereo system. #13#10#13#10The portable charging case with a built-in battery not only allows for convenient charging but also ensures safe storage of the earbuds in your pocket, bag, or backpack. #13#10#13#10The XO X40 is an ideal solution for users of Bluetooth-enabled smartphones, computers, notebooks, and tablets. The earbuds are compatible with both Android and iOS, allowing for seamless connection to multiple devices. #13#10#13#10The built-in microphone allows for high-quality voice calls. A full charge lasts approximately 240 minutes, depending on the volume level, thanks to energy-saving Bluetooth 5.3 technology.