Features: Adopting passive design, it provides a deeply and powerful bass effect, making music more impactful. The combination of lightweight plastic and rubber materials makes the loudspeaker not only durability but also easy to carry. Compatibility with multiple sound devices, it can be connection without the need for additional conversion devices. Quick installation without the need for tools simplifies the usage process. The combination of plastic and rubber not only enhances the wear resistance of the product, but also provides a certain anti slip effect. Specifications: Component: plastic + rubber Size: 88x48mm/3.46x1.88inch, suitable for use in various environments. Attribute: Available in classical black Package Includes: 2Pcs Bass Assist note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.