The R5090 is an easy-to-use power meter that accurately measures power consumption of household appliances. Simply set the local utility rate in Killowatt-hours (KWH) and connect an appliance to start tracking cost. The R5090 can also be used to verify power quality by monitoring voltage, frequency and power factor.Features

• Calculates operating costs of household appliances
• Displays 8 important units of measure (Voltage, Current, Watts, Frequency, Power Factor, Energy used (kWh), Total Cost and Elapsed Time)
• Easy-to-read, dual LCD display
• Built-in battery backup
• Conforms to UL and CSA standards