The JG Series family of power and light modules includes five great, economical models that are valuable accessories for any rack-mounted system. The switched outlets on the back of each unit provide power while the discreet components inside provide a basic level of protection to help clean up dirty and dangerous AC voltage. The Basic power conditioning includes a fast-acting metal oxide varistor (MOV) installed to clamp voltage spikes running between the incoming line and neutral leads. This level of conditioning also includes a capacitor to reduce the level of AC line interference that may be transmitted between the line and neutral leads.