3 times/week. The Cat Butler Mouse Repellent is a high-tech research and development product aimed at mice and pests. It has the best effect when used three times a week. It combines high-tech microelectronics technology and can simultaneously and intermittently generate low-frequency electromagnetic waves, ultrasonic waves and bionic wave frequencies. Triple frequencies affect the auditory system and nervous system of mice and other pests, causing discomfort and causing them to flee the scene.