Hi-Fi Sound and TF Card Design: The Riwbox XBT-90 Bluetooth wireless headphones has such features as a clear bass design and a 40mm oversized speaker. The superior sound quality design gives you a clear feeling of the changes in the treble and bass of the song, and bring you into an immersive closed listening environment. And the XBT-90 wireless headphones work with a built-in TF card slot, so you can enjoy music wherever you are. Bluetooth 5.0 Technology: Bluetooth 5.0 provides you with a stable and fast Bluetooth connection. Once the bluetooth matched successful, there's a voice prompt in the headphones and the connection and battery status will be displayed on the screen of the smartphone. They can connect to the Bluetooth-enabled devices,such as iPads, iPhones, iPod touches, Android smartphones, tablets, etc. Wireless and Wired Design: XBT-90 Bluetooth headphones, (1) Wireless mode:With the Built-in 420mAh battery, The battery update to 18-hr of of music time / 25-hr of talking time on a single charge.(2) Wired mode: There's a free 3.5MM headphones cable in the package, and the built-in controller is used for Remote Play, pause and skip tracks. It is equipped with a high-quality built-in microphone for hands-free calling. Fashion and Personalized Design: Concise appearance and stylish color scheme. As an eye-catching wireless headphones, they are adopted the popular color design,there 4 color options: White-gold, Black-gold, Rose-gold and Purple. We also pay attention to the customer experience. These Over ear headphones combined with the custom fit sponge padding and adjustable headband,foldable design makes the wireless headphones easy to carry and take up no space.We aslo offer a free drawstring carrying bag. Perfect Packaging Design and After-Sales Service: Package with an XBT-90 Bluetooth headset, a 3.5MM headphones cable, a charging cable and a drawstring carrying bag. We provide 7*24 hours customer service, perfect one-year after-sales warranty service to protect your shopping experience. No matter you are office worker or student, teenager or girls. This wireless headset is a great choice for your gift, so you can share your happiness with your friends and family.