The P3 International P4400 Kill A Watt Electricity Usage Monitor is a plug-in electronic meter designed to measure electricity usage in a 120V AC environment. It features an LCD display and operates at a frequency of 60 Hz. This unit is ideal for monitoring energy consumption in a variety of industrial and commercial settings, allowing users to easily track and analyze power usage patterns. The P4400 is brand new and factory sealed, ensuring accurate and reliable readings for your electrical usage monitoring needs.