Do Electro-Magnetic Interference mouse repellers really work ?

Question:Does anyone know if Electro-Magnetic Interference or Ultrasonic noise repellers really do keep mice away ?

Answers:
We have just purchased one, and thinking the same.they must do ... Suppose we have to keep them plugged in 24/7..

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I bought a couple of the cheaper ones, half nightlight, and they didnt work at all. Also make a small clicking noise that bugged me to death at night.

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only if the mouse has an nvq in electronics.

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