Inlet on Power Unit. Makes it easy to clean the area where the Power Unit is located. Convenient switch. Located on Power Unit, turns system on and off. No special wiring needed. Power Units (except CV850, CV750 and CV450) operate on dedicated 15 amp circuit. 120V AC, 50-60Hz circuit 20 amp dedicated circuit recommended for CV750 and CV450 units. CV850 requires 15A 240V inlet. All feature overload protection and built-in low voltage switch controls. Rugged steel housings. Handsome, durable designer white polyester appliance finish. Mounting bracket. Provides fast, easy, secure wall-mounting. 6-ft. cord. 3-pronged, grounded plug for convenience outlet. Large 6-gallon capacity. Needs emptying only about twice a year. UL Listed