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A: This product generates high-frequency sound waves through an internal electronic oscillation circuit, typically ranging from 20 kHz to 65 kHz. This frequency is far beyond the upper limit that the human ear can perceive (approximately 20 kHz), so humans cannot hear its sound. These high-frequency sound waves are said to stimulate the auditory and nervous systems of pests, disrupting their normal behavioral patterns such as feeding, communication, and nest-building, thereby causing discomfort and prompting them to leave the covered area.
Theoretically, mice and many insects are highly sensitive to this high-frequency sound wave. They use similar frequencies in their natural environment for communication or to sense danger. The ultrasonic pest repellent emits sound waves with specific rhythms and frequency variations, attempting to break the pests' adaptation to a single continuous sound, making them intolerant and choosing to leave. The frequency range of different products can range from 30kHz to 95kHz, covering the sensitive frequency bands of various pests.

A: No. The working principle of the ultrasonic pest repellent is to drive away pests rather than kill them. It creates an environment that is "very unfriendly to sound" to stimulate the pests, making them uncomfortable and causing them to leave on their own. It does not kill the pests directly like poison bait or traps do.

A: It cannot penetrate walls, floors, ceilings or furniture. Ultrasound is essentially a high-frequency mechanical wave, and its propagation in the air is greatly affected by obstacles. Hard surfaces (such as concrete walls and furniture) will reflect or block the ultrasound, while soft surfaces (such as carpets, curtains, sofas, and soft cushions) will absorb the energy of the ultrasound, resulting in a significant reduction in the effective range.

A: Usually not. The upper limit of hearing frequency that cats, dogs, birds and fish can perceive is typically much lower than the operating frequency of ultrasonic devices (approximately 25-65 kHz). Therefore, for generally healthy cats, dogs and birds, these ultrasonic sounds are inaudible and do not cause stress or discomfort.

A: For ordinary household electronic products, since the ultrasonic frequency is much higher than the electrical noise of common household appliances, these devices themselves adopt independent electronic oscillation and sound generation systems. They generally do not cause measurable interference to daily appliances such as televisions, WiFi, microwave ovens, and refrigerators.