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The module uses HID technology, without any drivers, plug and play. Support WIN7/XP 32/64-bit systems, easy to use and simple. High-performance USB controller chip, military grade PCB board production 5V relay, the relay can control the maximum 250V 10A AC load and 30V 10A DC load. PCB size: 56.5mm x 24.9mm. Fixed hole size: 3mm, fixed hole center moment: 52.2mm x 20.6mm.