Memory card slot with SD card storage support for fast data transfer and easy backup. LED adjustment knob for light control; turn left or right to set the desired illumination level. The keys are clearly engraved and smart keys can be switched for intuitive, reliable operation. Focusing wheel for precise sharpness control; rotate left or right to adjust focus accurately. Benefits and practical value Simplified data handling: SD card compatibility lets you store and access files directly without extra adapters. Flexible lighting: adjustable brightness helps achieve proper exposure in variable environments. Easy to use: clearly engraved keys and switchable smart keys reduce confusion and misoperation. Fine focus control: the focusing wheel enables precise sharpness adjustments for clearer images. Specifications and notes Function: memory card slot with SD card storage support; LED light control; clearly engraved keys with switchable smart keys; focusing wheel for sharpness. Compatibility: SD cards supported through the built in slot. Size and material: not specified in the available information. Performance indicators: enables convenient storage, adjustable lighting, and precise focusing for improved image quality. Use scenarios Studio product photography: use the SD card slot for quick saving and transfer, adjust lighting with the LED knob, and fine tune focus with the focusing wheel for sharp product shots. On location interviews or events: rely on SD storage to back up footage on the spot, use the LED control to adapt to changing lighting, and switch smart keys for ergonomic operation during extended shoots. Travel or field reporting: compact control set with immediate storage and adjustable lighting to handle varying environments while keeping focus precise.