Features: This double high speed port testing board features two interfaces to dramatically enhances testing efficiency for performances, GPIO continuity, and flashing read/write operations, solving traditional single port delays. Compatibility for module via standardized pin interfaces, jumper protections for safety, LED indicators, and integrated USB power supply. Ideal for production line operators and electronics testing engineers, this board streamlines workflows in manufacturing environments. Perfect for mass production testing scenario where simultaneous connection to boards and PC is required, ensuring stable and efficient batch evaluations. The USB powered design simplifies testing bench setups by reducing reliance on external adapters, enhancing overall reliability and ease of use. Specifications: Component: PCB+Electronic component Double high-speed port:COM1/COM2 Compatible for module Supports 3.3V power supply Size:Approx.4.1x4.15cm/1.61x1.63inch Note: You need to confirm the short-circuit position of the jumper before use; needs to be connecting to IO15 to GND; needs to be connecting to IO8 to 3.3V. Package Includes: 1pc Production testing Board note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.