... (- AC) interface can test the electric parameters are as follows: voltage, current, power, power factor, annual power consumption (10 hours /per day ) and frequency; DC ... : The power of the DC12V lamp can be showed. Notes: Wiring must be connected as shown below method, otherwise, it may ... cause damage to the tester.Wiring:1,2 connect to DC9V~25V for testers power,3 ...