UT230B series power sockets can be inserted to monitor the operating status (voltage, current, time, and power consumption, and more) of electrical appliances. Alarm will go off and display ´OL´ when errors are found. The socket jacks are designed to meet the needs of different regions with proper certifications. UT230B series are ideal tools for maintaining equipment power consumption and a good tool for managing energy saving in homes, offices, schools, and other places.