Protect your electric devices with the Diversitech Digital 3-Phase Line Voltage Monitor. This monitor offers continuous protection against voltage anomalies which can damage compressors, motors and other sensitive electrically operated devices. The large digital LCD display provides instant display of the system's operating voltage, not just indicator lights. This monitor can connect to just about any control circuit - normally-open and normally-closed contacts are provided for connection to any type of system, motor control, or alarm. The operation is super simple - just 3 buttons set up everything and provide easy adjustment of voltage and tolerance timers. Measuring 7.65" x 1.2" x 7.65", this compact voltage monitor fits where others can't. Ensure your devices are safe against voltage anomalies with the Diversitech Digital 3-Phase Line Voltage Monitor! DiversiTech Corporation is North America's largest manufacturer of equipment pads and a leading manufacturer and supplier of components and related products for multiple industries, including: HVACR, electrical, consumer hardware retail, electrical utility, automotive retail and pool and spa channel. We offer high-quality, innovative and advanced products that save time on installations. Combining exceptional customer support with a full line of HVAC parts and accessories, we provide the resources and tools necessary to meet any customer needs.