Main Features:- It is applicable to repel cockroach, mosquito, insect, pest, mice etc. - The repelling ultrasonic frequency is 20 - 55KHz and the effective range is about 20 - 50sqm- Non-toxic and environment-friendly- Safe and odorless- With ABS shell, durable and shock resistant- Voltage: 220 - 240V Applicable Area: 20-50 square...