[16 EQ Modes Adjustments With TOZO APP] The TOZO APP offers seamless connectivity with the TOZO PA2 speaker and provides 16 EQ adjustment modes. This allows users to effortlessly switch between different music styles and indulge in an unparalleled musical experience whenever they please. [Cord Buckle Design - Easy to Carry Around] The unique cord buckle design allows for effortless attachment to your backpack, making it ideal for travel, parties, outdoor activities, vacations, and even in-car use. If you desire to enjoy your music beyond the confines of your home, a portable Bluetooth speaker is an absolute must-have, Simply secure it to your backpack and embark on exciting adventures!. [25H Continuous Playtime] The TOZO PA2 speaker has a powerful 2000mAh battery capacity that allows it to play continuously for up to 25 hours on a single full charge. This long-lasting battery life ensures an immersive listening experience during long outdoor trips. [Multi-function Speaker for Various Situations] With IPX8 waterproof function, the PA2 speakers are resistant to gentle splashes of water or rain, providing strong protection against water damage. What's more, it supports direct calls via Bluetooth, voice conferencing, group chats, and access to default voice assistants like Siri for hands-free convenience in your intelligent life. [Dual Drivers & Dual Bass Diaphragms] The TOZO PA2 Bluetooth speaker boasts two dynamic coil drivers for audio output, enabling not only independent left and right channel playback from a single speaker, but also the connection of two speakers for an immersive stereo sound experience and enhanced bass, With this innovative setup allows you to enjoy a whole new dimension of music.