1.Theory Ultrasonic housefly repeller emits ultrasonic waves to make stimulate the nervous system of flies and influence its behavior, and make them feel discomfort and get away.
Usage:
1)Plug this unit into the wall socket and it is going on work.
2)The red light shows that power supply is working. Green light, indicating that the system is working,also blink,emit ultrasonic wave.
15 days