Accurately measures the power consumption and calculates the operating costs of household appliances. REED R5090 Offers 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 Included Power Meter Battery