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Function features:

Intelligent control chip helps fan automatically enter into the test condition as soon as starting on; Power will be cut off automatically when motor in bad operation, to protect the motor.

Instead of traditional thermocouple sensor current test, electric tester makes quite accurate test on lack of phase and over-current. Prompt protection which takes 8 seconds only. 

Aesthetic, practical, simple, clear, one button control, remote control, convenient for the motor management. 

Safe operation: plastic cover is water-proof, corrosion-resistant, no noise, no interference, no spark. 

Provide the protection in condition of lack-phase, over-current and overloaded.