PMB03 multifunctional power meter socket is a plug-and-play energy monitoring device for daily electricity measurement. It can display real-time voltage, current, active power, cumulative energy consumption, power factor and frequency clearly on LCD screen. Built-in overload protection prevents damage caused by excessive load and improves electricity safety. Users can monitor power consumption of household appliances to achieve energy saving. No complex wiring required, simply insert between power source and electrical devices. Compact size enables convenient storage and use at home or office. Adopted high-quality flame retardant housing for durable service. Factory direct wholesale is supported. It is an economical testing tool for families, maintenance personnel and energy consumption statistics.