[Dual Drivers and Dual Bass Diaphragm] The Bluetooth speaker has two dynamic coil drivers for audio output, which can not only play independently from a single speaker, but also connect two speakers to bring an immersive stereo experience and enhanced bass. Through this innovative setting, you can enjoy a new musical dimension. [Multi-function speaker suitable for various situations] has IPX8 waterproof function, and PA2 speaker can resist gentle water or rainwater splashing, providing strong protection and preventing water damage. In addition, it supports direct call via Bluetooth, voice conference, group chat, and the use of preset voice assistants such as Siri, making your smart life hands-free and convenient. [25-hour continuous playback time] The speaker has a powerful battery capacity of 2000mAh, which can play continuously for up to 25 hours once fully charged. This long-lasting battery life ensures an immersive listening experience during long outdoor trips. [Rope buckle design-easy to carry] The unique rope buckle design can be easily connected to the backpack, which is very suitable for travel, parties, outdoor activities, vacations and even car use. If you want to enjoy music outside your home, a portable Bluetooth speaker is absolutely necessary. Just attach it to your backpack and start an exciting adventure!