The reliable and fast voltage tester features the most important nominal voltages. The device can perform a single-phase test and a phase rotation test, including the display of phase direction. During the automatic continuity test, the user is informed by an acoustic signal. The device is suitable for all building installations and conducts a safety self-test starting from 50 volts to ensure safe operation. The integrated flashlight illuminates the testing area, making work in dark environments easier. Additionally, the voltage tester has a battery-free emergency operation and a robust housing, which is largely made from recycled plastic, contributing significantly to sustainability.