1. AVR Digital Era, -DAVR-150S3 Multi-Functional Digital Voltage Regulator, Life Has Been Inseparable From The Electricity, Ready To Standby For Your Life To Light Up The Luster 2. Intelligent Digital, Remote Intelligent Monitoring, Digitization, USB Port Connected To Computer, Real-Time Monitoring 3. 50-60HZ Frequency Selection, Low Frequency Led Indicator 4. Input Voltage, Glass Pomelo Wire Wound Resistor 5. Resistor ZOV Model: -DAVR-150S3 Sensing/Power Input: Voltage Span Range 90-130V AC Voltage: Maximum 150V AC, Three Phases Frequency: 50-60Hz Minimum Resistance: 15ohm Pressure Precision Adjustment: Less than ±1% RMs, 4% Generator Adjustment Colour:black+silver Material:PCB Size: 15.9 x 8.4 x 2.9cm Package Contents: 4 x Voltage Regulator Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.