Simple installation instructions to install Varna Ultrasonic Rat Repellent in Honda City car to deter any kind of rats entering the engine bay through wheel well.
Fix the repeller firmly facing (45 degree) the bonnet hood using plastic tags and supporter provided. This will help to reflect the ultrasonic sound to other side of the engine parts.
If the hood has heat insulation, stick the aluminium foil to reflect the sound 100% back to the other part of the engine. Because heat insulation pad absorbs the ultrasonic sound to some extent and reduces the effectiveness.