Ultrasonic Insect Repeller Double Horn Auto Frequency Conversion Mosquito Repellent Black Item Type: Pest Repeller Material: ABS Color: Black Weight: Approx. 115g / 4.1oz Rated Power: 5-8W Acoustic Frequency: 22KHZ-85KHZ Acoustic Waves Varieties: Ultrasonic, Electromagnetic Waves Speaker Type: Ultrasonic Horn + High Frequency Horn Covering Area: 200m² Product Features: Full frequency band dynamic cross frequency conversion technology How e: 1. After plugging in the power supply, press once to make a beep, the green light flashes twice, and the system self-checks, and the green breath light is on with a beep, and the system starts to work. Press and hold to shut down. 2. If the system red light flashes, it means the system is faulty and work is prohibited.