Features: Adopting imported chip power amplifier and 16core internal magnetic speaker to make the specializedsound more pleasant The built-in remote control allows for easy control and unrestricted access to devices such as desktop computers and mobilephones. It is compact and does not take up space. If you want to stick it, you can stick it there, behind the computer desk, on the side, or on the bottom. USB 5V power supply, easy install and use Widely used in 3.5MM Audiodevices such as mobile phones, tablet laptops, and desktops Specifications: Material :Metal For:forRaspberryPi 4B/3B+Development Board Speaker AudioAmplifier Board Quantity: 1PC / 2PCS Note: Due to the different monitorsand light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviationdue to manual measurement. Package includes: 1PC/2PCS Speaker AudioAmplifier Board Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.