Help Deleting device from Android

[sanpiran]

I have bought a bluetooth remote keyboard to make text input easier for my Android 4.2.2 phone. But somehow it will not now pair, saying that the 'password or key' is missing. I did not keep the original key password. It still shows as a bluetooth device, but not as a keyboard and I cannot delete it in order to try pairing once again from scratch. Any ideas how to delete a device?

 

[Pugs1957]

You will need to unpair it, delete doesn't seem to be an option