This power supply is an ideal bench top battery eliminator. Substitutes a wide variety of batteries including AA, AAA, C, D and 9 volt types. The voltage is conveniently selected by a rotary switch. Advanced, solid-state electronics provide both LINE and LOAD regulation of the output voltage. The voltage selector switch is precision-designed so that the output voltage does not increase during adjustment between voltage ranges. Specifications: Input Voltage:120VAC.Output Voltage:1.5, 2.2, 3, 4.5, 5, 6, 7.2, 9, 10, 15, 21.25VDC.Output Current:1A max. Accuracy: ±2%.Dimensions:3 3/4″ (H) x 8 1/4″ (W) x 7″ (D).Weight:5 lbs.