Had decided on the USB keyboard gestütze because I blueooth as a stand-alone solution was not safe just because some reviewers have written on demand of misfires and connection problems. Since in this case the USB connection is used only to charge the battery installed and not a data connection, I've been waiting two weeks for the delivery of this keyboard. The wait was worth it. One gets the keyboard from the T440 ThinkPad, has a good writing experience and no connectivity problems, even if at the shapely, reduced and flat (distance to the tabletop 12 mm) Keyboard the detachable USB cable is almost already registered as a design disturbing. Was a popular hobby at ThinkPadbesitzern and her laptop and her keyboard to push until they find a place where it / they can be bent (Flexing). This keyboard can both turn at the top, as well as at the bottom. Ah those were the days when IBM Thinkpads and Equipment has produced - as bent nothing. Turn That bothers me less than the somewhat hollow writing sensation and sound is temporarily produced what is not only with the different keystroke during the writing process in connection beyond the ujn-line. No idea why this is, but both phenomena would probably be far less pronounced, would rest the keyboard flat and not supported by five rubber feet. On a Shifteinrast LED has been omitted. Flexing and all other criticisms affect the work with the keyboard in any way. I use from the outset solely the TrackPoint as I'm used to it from my ThinkPad. The external keyboard is under Mouse Properties after a short installation, a separate register. Of course, two stand can extend that valuable aspect and chamfer the keyboard surface. A green status LED, there is also. It comes on the back above the USB cable. There are worlds that justify the enormous costs between my old Logitech Deluxe 250 and this keyboard. Now have the priceless ThinkPadhandling also on my 23 "monitor at home.