Hi coeur29, to setup barcode scanner preferences you scan the code from the manual. Beeb sound volume up or down, scan the code, infra red auto detection toggle, scan the code. If on by default it is turned off, until the device is rebooted or re-plugged into the USB. I as apparently you did not have even a simple set of lame preference settings included just a lavish if not cryptic description of the scanner stand. You piqued my curiosity now to discover just which code set to set preferences on the scanner. Odd they did not include even a simple copy of the hardware manual codes. I would think a very few would suffice. beep loud soft off, ir detection toggle, that surely would not be more than an extra page or even printed on the back side of that creative stand assembly instruction. The short of it, the preferences are set by reading a control barcode. I do not know what or where to find the control barcode at this time.