USB-A port
H1 connects to the host through a single USB-A connector. This is the only physical connection the device needs — it carries both power and data, whether H1 is acting as a USB HID keyboard in Attack Mode or as a USB CDC (serial) device in Upload Mode.
Earlier design proposals considered an additional USB-C port for dual connectivity. The current hardware revision uses a single USB-A connector to keep the device simple, low-cost, and compatible with the widest range of hosts.
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