Rodent repellent systems are electronic systems used to produce high-frequency ultrasonic waves that are used to cause discomfort to pests that cause an infestation. These devices are used as repellents to get rid of rodents or pests that cause damage to inventory or spoil the ambiance of a space. Rodent repellent systems essentially cause discomfort for these organisms thus making them vulnerable to avoid creating their habitat in that space. These devices are practically inaudible to humans and thus do not cause any harm to them.