I've now had time to use the SIIG slim duo for a couple of weeks. There is sometimes a noticeable lag when I'm typing and it does occasionally miss a keystroke. This may be due to the super slow low power tiny little box I use for a computer but I've just got an overall impression of slightly less than the very high quality I normally need from my keyboards. I'm not unhappy but just want to warn. There is no INSERT key which will limit your paste options on some platforms. It does have the backspace at the top right on the edge of the keyboard where my finger finds it automatically. One of the main reasons for getting this particular wireless. The key feel is a little more clunky than I'm used to but no trouble. The keyboard angle is not a selling point. There's this myth that keyboards have to be angled up. They don't. It just increases the angle of your wrists, which should be neutral. But the angle is bearable. The keyboard has a solid metal base that makes the keyboard pleasantly heavy, solid on the desktop and apparently robust. That part is great. It even says it's spill resistant but I haven't tested that! It's got four little rubber feet to so it doesn't slide. It's really noticeable that the battery cover hardly stays on. It has a very light click and is in danger of falling off. In practice, held down on the desk, it won't be a problem but if you're moving around you'll need to keep an eye on it or end up looking for it on the floor. Although the two AAA batteries (supplied) are quite exposed without it. There's one USB stub (low profile) to stick in to serve both keyboard and mouse, so you save one USB socket, and you keep it on a dummy slot in the mouse or keyboard when not using it. As you'd expect, starts up no trouble on Linux, works out of the box, nothing to do. The mouse feels a bit lighter than your average. Perhaps because it's really small. It's 9cm by 5.5cm and a very low height too about 2cm and a bit. I don't think my last travel mouse was smaller. Even with the two AAA batteries (supplied) in it, it feels very light, in contrast with the keyboard. Judging by the battery cover the plastic may be thinner than usual, contributing to the light feel. This is a four button mouse, as advertised, but probably not the four you might be thinking. It has a left, a right, the scroll wheel can click down, and the CPI switch button is the fourth. I'm not sure you can detect / program that button, so maybe it's a three button mouse really? Clicking the CPI button makes a noticeable difference to the mouse speed, so you can switch between fast and slow mouse modes there without going in to system settings. The mouse only has a detent controlled scroll wheel (doesn't spin). It's quite a thick rubbery feel to the scroll, the scroll has a thick, solid rubbery feel and is consequently very positive but also very slow. No backlights. You'll need a desk lamp at night. I would prefer USB charging instead of batteries, but there you go. Also the mouse doesn't quite match the strength of the keyboard and could afford to be a bit bigger, although if you're fed up of the mouse making your laptop bag bulge this one will be a good deal less noticeable.
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