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This is a wireless keyboard/mouse combo with dual PS/2 interfaces. It is infrared so it does require line of sight. It takes 2 AA batteries which are included (just put fresh ones in). There is a pad and 2 buttons on the upper left/right of the keyboard which allow you to control the mouse cursor.
I used to use this on a HTPC so it wasn't used much, a few keystrokes here and there, but it worked fine. I can't test it now since I don't have a computer with PS/2 interfaces for mouse and keyboard, but if for some reason it doesn't work, you can return it.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.