Features: 1. LCD Monitor: The electricity usage monitor has a large, clear LCD screen that is easy to read and provides reliable visibility 2. Electricity Usage Monitor: Helps reduce energy consumption and allows for easy voltage and current power detection 3. Alarm Function: Includes alarm features such as overload alarm, power usage alarm, cost alarm, and LED light indication 4. Overload Protection: When the total power exceeds the rated capacity, the LCD screen displays an overload warning, accompanied by an audible alert to notify the user 5. Various Parameters: Displays multiple parameters including power (W), energy (kWh), voltage, current (A), power factor, cost, minimum and maximum power Item Type: Watt Meter Material: ABS Product Size: Approx. 16 x 7 x 7.2 cm / 6.3 x 2.8 x 2.8 in Use: Power Measurement Socket Battery Type: Button Battery (included) Battery Chemistry: NiMH Battery Nominal Capacity: 20 mAh Operating Voltage: 120 V Specification: US Plug AC Frequency: 60 Hz Voltage Range: 110 V to 130 V Operating Current: Maximum 15 A Power Display Range: 0 W to 1800 W Current Display Range: 0.0 A to 15.0 A Weight: Approx. 195 g / 6.9 oz Package Includes: 1 x Watt Meter