【Old Items】: This ultrasonic mosquito repellent is made of ABS flame retardant material, which is safe and non-toxic. The alternating frequency of ultrasonic waves to drive away mice, rats, mosquitoes, flies, beetles, cockroaches, moths, ants, bed bugs and more. 【3 Modes 】: After putting ultrasonic insect repeller for mice plugged in, it will make “Bi~” sound. Mode ①: It is a fixed frequency mode. Mode ②: The night light is weak and enters automatic frequency conversion mode. Mode ③: The brightness of the night light is strong. It enters the enhanced two-wave mode. 【Frequency Conversion Technology】: It is used to generate bands of varying frequency pulses, constantly attacking their auditory and nervous systems, making it impossible for them to survive in this environment. Please insist on using the ultrasonic mosquito repellent plug. Mice will completely disappear in about 4-5 weeks. 【Effectiveness of Extended Coverage】: A single ultrasonic mosquito plug is suitable for indoor spaces
