Because this product is a physical repellent, it usually takes 1-4 weeks of continuous use to show its effect: rats, mosquitoes, cockroaches, etc. infrasound. In areas with less rodent damage, more obvious effects may be seen within 1 week; in some areas rats and cockroaches will be more active/running in the first 3-5 days. This is a normal reflection: this is caused by rats, mosquitoes, cockroaches receive interference stimulation of ultrasonic and electromagnetic waves from this product and produce neurological disorders and irritable physiological reactions! This product has no harmful effect on the human body, please rest assured to use! Precautions for safe use: 1. Install the 220V power outlet on the wall 20-30cm from the floor (most of the power left by the home decoration is at this height), and keep it vertical to the floor (remember that the product cannot be placed on the ground). 2. There should be no large obstacles within 1 meter of the front of the product (i.e.
