CIRWATT B 101-102 are single phase residential meters with class B (class 1) in active energy and class 2 in reactive energy. It has 4 tariffs and a flexible configuration. An advanced design offers high features and versatility to fulfill requirements in domestic applications. These meters have memory to record load profile for 400 days, 12 billing closures and moreover tamper registers and power quality information. As an option it has a backlight display to help in reading energy consumptions or any other information showed if there is no enough light.