This document provides information on voltage detectors and self-testing voltage detectors from Salisbury. It describes how voltage detectors are used to verify if conductors are live or de-energized. It lists various models of voltage detectors that detect different voltage ranges. It also describes a separate 4445 voltage detector tester that is used to test if the voltage detectors are functioning properly by emitting an audible and visual signal when activated by an electric field. Instructions are provided on testing the voltage detectors and troubleshooting issues.