ASM 2506661-21-01 Rev. B 1001-631-21 REV C

The product is a circuit board with the brand ASM, specifically identified by the part numbers 2506661-21-01 Rev. B and 1001-631-21 Rev C. This circuit board falls under the categories of Printed Circuit Boards (PCBs), Circuit Boards & Prototyping, Electronic Components & Semiconductors, Electrical Equipment & Supplies, and Business & Industrial. It is likely a high-quality and essential component for electronic devices or equipment.