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simian 2018-01-21 10:38:46
Conclusions after 1 week of use, and some technical tests: 1/The frequency range is not exactly as advertised (see images) When checking with an oscilloscope I measured the following base frequency sweeps: -setting 1 from 13.8kHz to 19.7kHz -setting 2 from 15.7kHz to 24kHz (human hearing ranges to about 17,5/20kHz) -setting 3 from 25kHz to 43kHz I bought this to scare away cats so initially used setting See More
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