Table 1.
The nine ultrasonic devices used, along with their frequency (in kilohertz), as stated by the manufacturers.
| Devices | Manufacturer | Ultrasonic Frequency (kHz) |
|---|---|---|
| A. TICKLESS ® PET Ultrasonic Tick and Flea Repeller for Pet | ProtectONE Ltd., Budapest, Hungary | 40 |
| B. MOZZIGEARTM Portable Ultrasonic Mosquito Repeller | Intelligent Health Systems, Guangdong, China | 5–20 |
| C. TICKLESS ® HORSE Ultrasonic Tick and Flea Repeller for Horses | ProtectONE Ltd., Budapest, Hungary | 40 |
| D. Pet’s Pest Repeller | www.Petshopboyz.com.au, accessed on 28 September 2020, Sydney, Australia | n/a |
| E. L1-118 Portable Electronic Insect Repellent | Shenzhen Dowdon Tech Co., Ltd., Guangdong, China | 9–21 |
| F. Portable Smart Pest Repeller | Shenzhen Dowdon Tech Co., Ltd., Guangdong, China | 13–75 |
| G. CSB24 Ultrasound device against ticks and fleas | Intelligent Health Systems, Guangdong, China | n/a |
| H. ELECTRONIC HELMINTHES MACHINE | Hunan Goldenserise Tech Co., Ltd., Hunan, China | 22–65 |
| I. ULTRASONIC PEST REPELLER Pest Reject | Hunan Goldenserise Tech Co., Ltd., Hunan, China | 50–60 |
n/a = not provided.