Multi-Function buttons and Long Battery Life: Our outdoor speakers are equipped with multi-function buttons, allowing you to easily control music playback and volume adjustment or other adjustments, providing a convenient operating experience. This speaker bluetooth only needs 1.5 hours of charging to provide up to 7-8 hours of battery life, meeting your time needs for indoor parties, outdoor parties and other activities, allowing you to enjoy this happy moment for a long time. Bluetooth 5.3 and Built-in Microphone: Our portable speakers feature the latest bluetooth 5.3 technology with a connection range of up to 33 feet (10 meters), giving you the freedom to enjoy music over a wider range. Additionally, the bluetooth speaker's built-in microphone allows you to make hands-free calls in the shower, bath, or other activities without having to worry about missing an important call or having to stop your activity to operate the speaker, bringing great convenience. Portable design and dual pairing function: The portable design of this wireless bluetooth speaker allows you to easily carry the speaker to the beach, gym, park, workstation, home, garden, etc, so that your music appreciation is no longer limited by space. The highlight of this version is that two K9 stereo bluetooth speakers can be connected to each other to create a left and right channel system. The left and right surround 360° HD stereo sound will take you to the climax of the music. IPX7 Waterproof and Suction Cup: Shower speaker with an IPX7 waterproof rating, capable of with standing water sprays and splashes, allowing you to use it worry-free in various weather and outdoor conditions. Such as you can enjoy music in the swimming pool, beach, bathroom, and other places. K9 speaker also comes with a solid suction cup, portable that securely adheres to various smooth surfaces, such as bathroom walls, glass countertops, or any other smooth planes, making it highly convenient. HD Stereo Sound and Colorful RGB Lighting Effects: This bluetooth speaker features HD stereo sound and colorful RGB lighting effects. HD stereo sound and stereo surround sound will create a concert atmosphere in your bathroom, living room, bedroom, kitchen and more, making you dance to the music. The colorful light show of the portable bluetooth speaker will light up the fiery party and push the passion to new heights.