Lenovo Ultraslim KBRFBU71 PC Computer Black Wireless Keyboard ONLY NO RECEIVER Untested - In good condition. No dongle to test it. It probably works but no guarantee. Keyboard only - Doesn't include dongle or batteries Wireless Keyboard KBRFBU71 Does not include receiver. Will not work without a USB receiver Can be paired with an existing USB Lenovo KBRFBU71 receiver To pair the keyboard with your USB receiver: Remove and Re-Insert the USB Receiver / Dongle into a USB port. Open back cover of the keyboard and remove the batteries Press the F2, F3, and F4 keys at the same time and hold down. Put the batteries in the battery compartment and close the cover. Release the F2, F3, and F4 keys Press 3 key one time.