Logitech 993-000439-01 Unifying USB Receiver for Mouse and Keyboard

Overall Review: Bought a old logitech board from goodwill. It was wireless, but had the unifying logo on it, so I purchased this receiver to pair with it. After installing logitech's own software, the keyboard worked perfectly.

Overall Review: Works

Pros: works

Cons: can't be positive its a genuine Logitech part

Overall Review: Received in a rather plain yellow envelope. The receiver seems to work fine with my Performance Mouse MX. The fit and finish of the receiver causes me to question its authenticity, however. First, and least importantly, it doesn't match the image provided in the description. It matches the newer style, only it seems a bit off. The angle of the black plastic cap is a bit different, the edge is noticeably sharper at the mold line. I'm not positive, but the ink on the orange star logo seems ever so slightly different than on my daughter's receiver. The interior circuit board, where the contacts are located, has a bit of a gap that seems uncharacteristic of a genuine product. All this could just be that it was made in a different factory than the others (many manufacturers use more than one factory), but it seems rather suspicious to me. Like I said, though, it's working fine so far.

Pros: inexpensive Able to pair with any Logitech unifying device

Cons: Build quality is iffy. It might even be not genuine.

Overall Review: This device has issues with stability. I have to hold the device or insert it specially for it to function in the USB port. Finally, after a while it completely failed!

Pros: Fast shipping Inexpensive

Cons: none

Overall Review: Direct replacement for a misplaced receiver that works flawlessly and at a reasonable price.

Pros: Easy to install... practically ready to use!!

Overall Review: I'll definitely buy again if needed

Overall Review: Keeps connecting and disconnecting.

Overall Review: Worked good! This replaced a lost unifying USB receiver.