Ultrasonic repeller uses the advanced technology, which can produce frequency conversion ultrasonic wave to affect auditory and nervous system of mice, mosquitoes, cockroaches and other pests and cause neurological disorder, loss of inappetence and mental fatigue, thus fleeing the scene. It also features aromatheraphy and atomization function, making it pretty practical to use. Protect your family from pest nuisances! Features: 2-in-1 function of ultrasonic repeller and spray repellent is applicable to repel mice, mosquitoes, cockroaches, spiders, ants, bugs and other pests. It produces ultrasonic wave to affect auditory and nervous system of mice, mosquitoes and pests to make them flee the scene. Aromatheraphy and atomization: built-in 12.5ml water tank for adding essential oil (at most 2 drops), creating a fragrant and soothing environment. 3 modes switchable: ultrasonic wave/ ultrasonic wave + continuous spray/ ultrasonic wave + intermittent spray. Different colors of indicator