Eliminates magnetic fields in CRT TV picture tubes or computer monitors as required prior to purity adjustments. Coil is made to standard industry specifications and is completely encased in 13" diameter molded, high impact ABS plastic housing. Supplied with 8 foot cord and monetary contact switch that permits de-energizing of coil without unplugging the unit. Safe to use. UL Approved. 117 VAC, 60 Hz, 2.8 A.