2022 Ultrasonic Pest Repeller Ultrasonic Pest Repeller with ultrasonic (22~65KHZ), it can emit non-toxic ultrasonic waves without radiation. It is a wise decision for you to replace harmful chemicals and poisons with this ultrasonic mosquito repellent. ✔ No radiation, safety. ✔ No noise, won't annoy you. ✔ Environmental friendly non-toxic. ✔ Easy to use, just plug it into the outlet. ✔ No chemicals and sprays, won't hurt your pets. ✔ This item is widely applicable in family, dining room, hotel, hospital, office building, storage, warehouse, farm and other indoor place . Material: ABS Ultrasonic frequency: 22~65kHz Input voltage: AC 90V~250V / 50Hz~60Hz Output power: 3~5W Effective area: 120 square meters / unit 4 * Ultrasonic Repeller 1 * User Manual