Rotating Knob: More convenient to rotate for volume adjustment and to create a new rhythm. Fashionable Appearance: MDF combined with classic fabric creates a stylish and beautiful look with advanced touch buttons. Bass Stereo Sound: The 70mm speaker resonates with the diaphragm, making the bass more powerful and immersive. Playback Modes: Bluetooth, memory card, AUX, and U-disk support cater to multi-scene playback needs, offering wired and wireless playback for unrestricted music enjoyment. Stable Connection: Bluetooth 4.2 provides a stable signal with strong anti-interference, allowing you to easily enjoy high-quality sound. Item Type: Bluetooth Speaker Material: MDF+Fabric Speaker Size: Approx. 70mm / 2.7in Bluetooth Protocol: 4.2 Frequency Range: 90Hz-20KHz Impedance: 4Ω Support: Memory Card, USB, AUX, MP3 Built-in Polymer Lithium Battery: 1500mAh (included) 1 x Speaker 1 x Manual 1 x Charging Cable