Features and Benefits:?Ammeter and power switch are located on front for easy operator access?Included with Vac-U-Rig? 4136?30 amp, 120 volt?Second outlet located on the backside of the unitSwitch box, 30 amp, 120 Volt. Ammeter and power switch are located on the front of the receptacle for easy operator access. A second outlet is located on the backside of the unit. Supplied as standard equipment with Vac-u-rig model 4136.