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3-120V: This voltage tester can measure voltages from 3-120V Easy Use: This voltage tester features simple one-button operation for user friendly use Compact Portable: This voltage tester is designed to be compact and lightweight, so it fits easily in your pocket or toolkit Accurate Voltage Detection: Voltage test pen LED display provides reliable, accurate voltage detection Versatile: From home electrical repairs to professional work, this voltage tester is suitable for a wide range of applications