The GNL-4000A /AE and GNL-4000A LED&GNL-4000AE LED come with European standards which are use in countries with 220/240 volt AC lines. It's designed as a pro rack power conditioner; it has special output plugs on the back which you then plug in to your internal power supply units with the normal IEC connector end into your unit. GNL-4000A is loaded with 12 IEC outlets (10 rear and 2 front panel), also features a 10-amp circuit breaker, surge protection, peak voltage clamping and RFI/EMI filtering to provide clean, uninterrupted power. The front panel houses 2 LED lamps with dimmer control for rack illumination. Front panel digital LED meter displays incoming AC line voltage on GNL-4000AE model only.