Do ultrasonic transmitters stop moles?
In my research, they have limited effectiveness if any. They are intended to bother a mole and make them move somewhere else. Depending on the brand, moles can become accustomed to this vibration. If you feel you must use this method, chose a devise that turns on and off frequently to keep the rodent guessing. Remember, even if it did work, the moles will return as soon as you run out of batteries.