Lenovo SK-8861 Ultraslim PC BLACK Wireless Keyboard - Receiver Not Included

No Receiver is included. 

How To Pair the Keyboard

1. Pull out the dongle from the PC USB port, wait, then plug it in again.
2. Put the batteries into the battery compartment, but do not close the compartment yet.
3. Press the F2, F3 and F4 keys simultaneously, then close the battery compartment. The keyboard will switch to pairing mode when the LED blinks slowly (around 2 times/second).
4. Put the keyboard close to the dongle (within 30 cm) for pairing.