The Centurion Vantage Screened Cable is an electrical cable that has a common conductive layer around its conductors for electromagnetic shielding. 
The shield acts as a Faraday cage – a surface that reflects electromagnetic radiation. This reduces both the interference from outside noise onto the signals and the signals from radiating out and potentially disturbing other devices. To be effective against electric fields the shield must be grounded.
Screened or shielded cable is always recommended to provide better protection against lightning.
 
 
call for more details