OVERLOAD ALARM FUNCTION: Backlight and power will flash simultaneously to give an alarm if active power value exceeds the preset value. Alarm value can be set by yourself, but applied load should not exceed the rated power. This AC digital meter is suitable for indoor, please do not use outdoor.
POWER-OFF DATA STORAGE FUNCTION: The last test data is stored automatically when the power supply abruptly lose. This digital meter can only measure the Active Power but not Apparent Power. If you measure power from a DC-AC inverter, please make sure it’s PURE SINE WAVE, or the meter can be burnt or melted.
This AC meter is used for single-phase power with one hot line and one neutral line. If you want to measure the circuit with 2 hot lines, you will need 2 meters, one for each line.

4-in-1 DC Multimeter – with 1.0 grade measuring accuracy, it combines Voltage, Current, Power and Energy measurement in one combo, super compact and lightweight that can be portable and easily used
Unique Voltage Alarm Function- the backlight and voltage value will flash simultaneously if the testing voltage is beyond alarm threshold (6-90V factory alarm value), and it can be set if needed
Data Storage Design – it is designed to automatically storage the last testing data when suddenly powered off and the energy value can be reset by a short press after long pressing the function button for seconds
Super Large Digital Display – 51x30mm easy reading LCD screen, clearly displays all testing figures at the same time, while the recessed button used to control the backlight, reset energy value, set voltage alarm threshold and choose measuring range