An LNB (Low-Noise Block downconverter) is the receiving device on a satellite dish (the bit that sticks out from the middle of the dish) that determines the number of recordings your Box can make at the same time. 

You can check what LNB you have by looking in the System Information menu in Settings. Go to the Signal Strength menu and next to Type you will see what LNB you have: 

• Wideband LNB (Used for SKY-Q & UHD Freesat)
• Standard (Univ) LNB (1 cable) 
• Standard LNB (Univ) LNB (2 cables) 
• MDU/MDU 2 [Often used in flats and apartment]

The good news is the Newer UHD Freesat boxes work with all types But... To record four programmes at one time on our 4K TV Boxes you will need a Wideband LNB.