This product is a high-frequency current, not ordinary multimeter test voltage, you need a professional high-frequency multi-table before the test can be obtained voltage. You test out different brands of pluripotent table voltages are not the same, there are gaps. Table to reflect a customer can test out more voltage is too high, some customers reflect the test out of the voltage is too low, this is the different types of testing out different results. Use of incompatible products will not pulled voltage