The XO X33 are 5.3 TWS Bluetooth in-ear headphones with a charging box. The headphones support TWS (True Wireless Stereo) technology, which allows both headphones to connect to each other and provide a wireless stereo experience. The portable box, equipped with a built-in rechargeable battery, not only charges the headphones, but also provides a safe storage solution for your pocket, backpack or handbag. Enjoy hands-free music and internet radio while working, walking, exercising or driving. The XO X33 TWS headphones are perfect for users of smartphones, computers, notebooks, tablets and other Bluetooth-enabled devices and are compatible with most Android and iOS devices. They also have a microphone for simple voice calls. When fully charged, the headphones offer around 240 minutes of talk or music time thanks to energy-saving Bluetooth 5.3 technology.