LogitechWireless Touch Keyboard K400 with Built-In Multi-Touch TouchpadCarbon Neutral Certified by SCS Global Services

Excelente producto muy buena calidad y trae las baterías incluidas 👌🏻😮‍💨

Have been using this for probably 10 years and it still works good for our HTPC.

Note: I have no vested interest in this product and the following review is 100% my opinion. In other words, I'm not getting paid to write this or anything like that. I'm just trying to give back to the people who have helped me by writing their own reviews.Summary: Great wireless keyboard/mouse solution with a few minor flaws in the ergonomics of the keyboard will make most buyers of this product very happy and satisfied with their purchase.Pros:-Tiny "nano" USB receiver lets you "set it and forget it". (it's also a "Logitech Unifying" receiver, meaning it can be used with multiple devices. See Logitech's website for more info)-Long range (30+ feet) with snappy response and no lag.-TouchPad allows you to not have to worry about finding a surface for a mouse, allowing this product to be used in a variety of positions.-Extremely simple to set up. On my Windows 7 machine, I plugged in the "nano" USB receiver and within 30 seconds I had almost full functionality. By installing the simple extra Logitech driver/software, I gained complete functionality and control over all aspects including dedicated buttons for volume up, volume down, mute, and "homepage" web browser button.-Simple but sleek aesthetics match most systems, making it fit right in with your other electronic equipment.-Two finger scrolling makes both vertical and horizontal navigation easy. Other advanced features can be turned on if desired.Cons:Since this is a lightweight and compact system, some sacrifices had to be made to fit everything in a reasonably-sized device:-The following keys are a bit too small which can be annoying and/or hard to get used to: Right-shift, Enter, and Backspace.-The following keys do not have dedicated keys but rather share keys with other functions and must be accessed by pressing the "function" key: Page Up, Page Down, Home, End.DETAILED REVIEW:Anyone with a laptop is used to a TouchPad mouse and keyboard interface. However, many times the fact that the screen of the laptop is attached to the keyboard/mouse leads to one of two problems: either your screen is positioned comfortably and your keyboard/mouse is not, or vice versa (your keyboard is positioned comfortably but your screen is not).This product solves the problem perfectly. The "nano" USB receiver is so small that you can plug it into your laptop's USB port (or any computer) and then never have to think about it again. The receiver is also a "Logitech Unifying" receiver which can be used with multiple devices. As of this writing, you can link up to six different wireless devices to one receiver.Another use for this product is for a media center or any system that is connected to a large HD TV screen as a monitor (for example using the HDMI out port on your computer). Once set up, this device gives you full control of all the functions of a keyboard and mouse, and can also act as a "remote control" for your home theater or media center. As I mentioned above, they tried to keep the overall size down but in doing so they had to make a few sacrifices in terms of key size. There are a few keys that are a bit small and can be frustrating at first, but with all the good things this product has going for it, I am able to overlook those minor annoyances and overall this is a solid piece of equipment that is very versatile, it gets the job done, and it doesn't look half bad either. For those who have been searching for a solution like this, I highly recommend it. I'd like to give it a 4.5 out of 5 star rating, but since I can't I'm giving it a 5 star because the pros heavily outweigh the cons and this product stands unmatched by any would-be competitors in its class.Feel free to ask me any questions you might have about this product and I will be happy to answer you. Again, I have no vested interest in this product, I'm just very satisfied with it and I want to share my experience.

Although there are a lot of promising ways to enjoy online content (web browsing, YouTube, Netflix, etc.) on your TV, the best one I've found so far is ... a computer.The Logitech K400 is clearly designed with this setup in mind, giving you full control of a computer in a couch-friendly form factor. Surprisingly, it seems to be one of the few such input devices with a (near) full-size keyboard instead of a tiny thumb-sized one. Obviously, that means it's much larger than a conventional remote control, but it's also much more usable. It looked like exactly what I wanted, and at a reasonable price, too.The K400 features a fairly attractive, clean design (aside from the odd "random lines" artwork on the trackpad). It's much lighter than I expected, which is nice, but it's also not incredibly sturdy. The build quality is fair for the price, I'd say, but doesn't seem likely to withstand a lot of abuse.As long as you don't plan on writing a novel on your TV, the slightly-smaller-than-full-size keys are pretty usable. They aren't backlit, though, which would be especially useful in a dark living room. On a semi-related note, the Caps Lock key doesn't light up, either ... but you don't use that key anyway, right?One very handy feature is the additional left-click button in the upper left corner, which lets you operate the trackpad with both hands or thumbs. It's a lot easier to click or drag with your left hand as you move the cursor with your right hand this way. The trackpad also conveniently offers Mac-style two-finger scrolling.Other nice touches include an on/off switch, and a slot behind the battery door to stow the teeny tiny USB receiver dongle. It also ships with factory-installed AA batteries, which is always appreciated.If you're looking for a decent keyboard for a home theater PC, this one seems hard to beat -- especially for the price!--About Mac compatibilityThe keyboard claims to support Windows only, but I suspected this wasn't the full story. Sure enough, when I plugged it into a Mac, the keyboard and trackpad worked automatically -- complete with two-finger scrolling -- on both Snow Leopard and Lion. Even the volume buttons are functional (but not the semi-pointless "home" button, it seems).OS X identifies the trackpad as a mouse, so that's the preference pane where you can configure the sensitivity of the tracking and scrolling gestures. The latter really needs to be dialed down to work well, in my experience. Also, you may want to remap the Windows (Command) and Alt (Option) modifier keys for a more Mac-like layout.The only catch? I can't figure out how to disable tap-to-click on the trackpad. (I'm hoping a software hack will make this possible, and that it's not hard-wired into the device itself.) Unfortunately, Logitech's Control Center software doesn't recognize the device, either.If you can live with that, the keyboard otherwise works just fine with a Mac, despite the official word from Logitech.