Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
No batteries since it's usb rechargeable. Media keys. It's also a usb rechargeable Laser pointer. D-Pad style arrow keys. 2 sets of mice keys, one on the left and one near the trackball.
Track ball isn't great. No function keys above F8. No insert key.
This doesn't use Bluethooth. That makes it better for PC's since you don't need to pair it up and it will work at the BIOS like a normal keyboard but it won't work on mobile phones, tablets, etc... Security might also be a concern as with any wireless devices, I have no idea if it's encrypted although I'm guessing it's not. Just don't enter sensitive information like password or creditcard numbers over it.
This is a fairly nice and handy keyboard. It has media keys so it can work as a kind of music remote (although you need to use the fn key so it's not as nice as a dedicated media remote). The trackball is a bit of a letdown. It's just a stainless steel ball-bearing and feels hard under the thumb, when you release it the cursor will often move a little making precision pointing difficult as you have to click while keeping a thumb on the bearing. One of the ones with a trackpad might be a better choice.
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