The XO X33 are 5.3 TWS Bluetooth in-ear headphones with a charging case. The headphones support TWS (True Wireless Stereo) technology, allowing both earbuds to connect with each other and create a wireless stereo set. The portable case, equipped with a built-in battery, not only charges the headphones but also provides a secure storage solution for your bag, backpack, or purse. Enjoy wireless music listening or internet radio while working, walking, exercising, or driving. The XO X33 TWS headphones are ideal for users of smartphones, computers, laptops, tablets, and other Bluetooth-enabled devices, and they are compatible with most Android and iOS devices. Additionally, the headphones feature a microphone for easy voice calls. With a full charge, you can listen to about 240 minutes of calls or music, depending on the volume, thanks to the energy-saving Bluetooth 5.3 technology.