For parts, NO RETURNS, being sold AS IS!
I installed batteries and pressed the Power button, but I got no response -- no lights, no beeps, no sign that it turned on. However, the battery low indicator did light up red for half a second when I pressed and held the tiny connect button on the bottom of the keyboard.
The light on the Receiver also lit up and my computer installed the device when I plugged the Receiver into my USB port. So that appears to be working (but I can't guarantee it).
Bottom line, I'm not tech savvy and didn't want to take the time to research this keyboard (the User's Manual is missing), so it may or may not work as intended.
Regardless, I'm selling it in the "For Parts/Not Working" category, meaning no returns will be accepted.
Requires 4 AA batteries (not included). The box shows a lot of wear.
BTC MCE Keyboard for Windows XP Media Center Edition FOR PARTS No Returns AS IS