This is our MM2 series portable waterproof, long-lasting Bluetooth speaker. With a total length of 23.5cm and a weight of only 900g, it's very portable and suitable for family gatherings or outdoor activities. Its large 7200mA battery ensures long-term use even in power outages. This speaker features 3.1-channel surround sound for a very realistic sound effect. It can be connected via Bluetooth or a wired connection, allowing you to continue using it even when Bluetooth is disconnected. This model is available in four colors: blue, black, red, and Khaki. We can also provide customized services if you have other needs. If you are interested, please contact us.