Piezoelectric loudspeaker parameter:
| Specification | |
| Resonant Frequency（KHZ） | 20±5 |
| Rated Voltage（Vp-p） | 5.0 |
| Operating Voltage（Vp-p） | 1-30 |
| Max.Current Consumption at Rated Voltage（mA） | 2.0 |
| Capacitance at 1000Hz（Pf） | 100000±30% |
| Min. Sound Output at 10cm at Rated Voltage（dB） | 90 |
| Operating Temperature（℃） | -20+70 |
| Storage Temperature（℃） | -30+70 |
| Case Material | ABS（Black) |
Piezoelectric speakers are commonly employed to generate sound in digital quartz watches and other electronic devices, and they are also utilized as tweeters in less-expensive speaker systems like computer speakers and portable radios. They’re also employed in sonar systems to produce ultrasound.
The insect repellent made with the ultrasonic piezoelectric speaker is effective for all animals, so it can repel other pests except dogs. However, this means that it may scare your outdoor cat, so cat owners should turn off the device before letting their pets out.
In addition, part of the Ultrasonic range of the device is audible to humans, so you should keep it as far away from human activities as possible. Putting insect repellent in your garden may keep animals away from your plants, but whenever you work in the garden, you may hear annoying high notes. Ultrasonic noise is especially noticeable to children, so you should keep the device away from the children’s play area.
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