Perixx Periboard-520 Wired Trackball Keyboard with Numberpad, Optical Rollerball Compact Keyboard with Numeric Keypad, US English Layout, Black, Compact Size (11490)

OK, so I am loving this keyboard in most ways. I love the dedicated numeric keypad, helpful as I test screen readers. I am typically a keyboard-oriented user, and the typing feel is definite, without mushiness. But the design of the trackball does pose challenges. I am not a big fan of trackball on the right, buttons on the left, but the placement of the right and left buttons is problematic, as others note. I am mostly wrapping my hand around the right corner and moving the ball with my thumb and pressing the left mouse button with my forefinger. The trackball isn't as sensitive as some others have commented, but the manufacturer may have responded to feedback. That wraparound technique is probably only manageable for someone with smaller hands, and it might not be manageable if the keyboard is in a drawer for rack-mounted systems, etc.. If I had larger hands, I could cup my hand over the numeric keypad and press the left mouse button with my forefinger and roll the ball with my middle finger. Overall, though, this keyboard is going to work best for people who aren't using a pointing device a lot. That being said, I like it better than the Adesso it's replacing. Kudos, too, for including an Applications key, when many keyboards omit them, which is hard on assistive technology users.

Perixx makes some powerful keyboards with additional usb ports included. This model that I purchased did not have these features. They could have probably reduced the power consumption by removing the lights but the keyboard works. I use it via otg cable with my samsung galaxy 6, my kindle fire hd and my fire tv 4k. The trackball works well with the galaxy and the kindle but is a little fast with the 4k and will take getting used to.The keyboard is comfortable with slightly raised keys.

Keep your keyboard works well I have no complaints

Perfect sized for anyone with more then one keyboard on the desk... I have 3 and they are great

Perfetta alle mie esigenze. Trovo utile anche il trackball in caso di emergenza, anche se continuo ad usare il mouse

Good keyboard. I wish they swapped the left alt and FN key. I wish the roller ball had a quick release to clean the dust. I wish it had a scroll wheel