"Works for single and three phase systems -12 stage programmable relay -Accuracy of ± 0.01 for power factor, ±0.5% for voltage and current -LCD display with dual colour backlite -Programmable PF: -0.8 to +0.8 -Settable Parameters: Number of relays, step time, discharge time -NTC sensor to detect temperature of panel and Fan output to cool the panel -Alarm indications for Overcompensation, Under compensation, CT -polarity error, Over temperature error, No voltage error -Auto and manual mode. -Wide Auxiliary supply: 90 to 550V -RS485 MODBUS RTU protocol"