The Acer BOARD.USB 55.A91N7.001 is a PCB board for restoring USB board functionality in a compatible Chromebook Spin. It is listed as an original Acer part, with the manufacturer code BOARD.USB and the exact part number 55.A91N7.001.
The listed compatible models are Acer Chromebook Spin 511 (R753T), Acer Chromebook Spin 511 (R753TN), Acer Chromebook Spin 512 (R853TA), and Acer Chromebook Spin 512 (R853TNA). The board is intended for these named systems; the listing does not specify port count, connector details, or other electrical characteristics.
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