- Easy to use and long playback: This Bluetooth speaker is designed for simple setup and hours of playback. It is compatible with Vivo iQOO Z9. - Durable and stylish design: Built with durable ABS plastic and a designer fabric cover, you can rely on it in outdoor sports, beach parties, street performances, or office activities. - Convenient controls and call capability: Top easy-access buttons provide quick volume adjustment and pause/play. It has a built-in microphone for hands-free calls. A MicroUSB port enables fast charging, and a large 800 battery capacity supports up to 6+ hours of runtime. - Hi-Fi sound with dual stereo option: Delivers high-fidelity audio and can be paired with a second speaker to create Dual Stereo mode for a wider soundstage. - Practical use scenarios: Ideal for outdoor gatherings and sports or beach activities, office or cafe environments, and gym or school settings. You can enjoy a Hi-Fi listening experience anywhere and expand to stereo by adding a second unit.