The BENDER VMD421H-D-3, B93010007 Voltage Monitor is a high-quality relay designed for general-purpose use in electrical equipment and supplies. Manufactured by the reputable brand BENDER in Germany, this unit is a reliable and efficient tool for monitoring and regulating voltage levels in a variety of industrial settings. With its unit quantity set to 1, this voltage monitor is a versatile and essential component for ensuring the proper functioning of electrical systems in a professional environment.