Features: Experience unparalleled auditory with For Charge 3 auditory mainboard, enhances your sound system precise and clearly. Enhances your Auditory capabilities with USB 2.0 auditory Power Supply Board. Constructed for long time use, this board withstands the rigors of daily use For Charge 3. Designed specifically For Charge 3, ensuring perfectly for your wireless speaker. Optimizes For Charge 3 wireless speakers charging with small USB Charging Port. Ease to connect your Phone For Charge 3 wireles speaker. Specifications: Size:about 6.5x2x2CM/2.56x0.79x0.79in Component:PCB Type: Optional For Charge 3 auditory mainboard Package Includes: 1PC Auditory Mainboard note: Due to problem of lighting effect, there might be tolerances in product, please understand. Please allow 0-2mm error due to manual measurement.