Logitech documents 2200_mousepointer.pdf, 4301_k750_solarkeyboard_lightandbattery.pdf, 6100_touchpadraw.pdf, 6110_touchmouseraw.pdf, logitech_hidpp10_specification_for_Unifying_Receivers.pdf have been created from .doc(x) files using LibreOffice. logitech_hidpp_2.0_specification_draft_2012-06-04.pdf was already a PDF, so no conversion was necessary. The contents of the aforementioned files are (C) Logitech. Retrieved from https://drive.google.com/?tab=mo&pli=1&authuser=0#folders/0BxbRzx7vEV7eWmgwazJ3NUFfQ28 (found at http://code.google.com/p/chromium/issues/detail?id=175572) usbmon.awk was a RE attempt before I found the spec, it helped me understand the packets when the specification was not available. You will find the HID++ 1.0 spec the most interesting. For an article about reverse engineering and an actual pairing/unpairing program for Linux, see: https://lekensteyn.nl/logitech-unifying.html usbmon.awk in this directory is outdated, the latest sources can be fetched from https://git.lekensteyn.nk/ltunify.git (git clone works, cgit also available). ~ Peter Wu