Widely use for home, construction industry, machinery and electronic equipment, etc.In order to effectively protect your home appliances and appliances life (you also can be a simple voltage test table).Suitable for measuring AC voltage in many place, such as office, factory, laboratory, household and so on.The biggest advantage is that if you see the current voltage is too low or too high.Backlit blue screen, easy to read in dark environments. To monitor the electrical safety use voltage.