Not very loud. Just an audible screeching sound. Easily detected. Not at all effective in any covert way.

Would this work on gangs of thieves? I'm going to Europe, and I'd love to have a non-lethal way of deterring those gangs of thieves from approaching

HI! Well no!!! I would suggest pepper spray! it's not intended for that,it's better for hang out deterrent and a mild one.But it works for what it's intended. THANK YOU! PS check with local laws on pepper spray,and buy it over there since you may not be able to take it on the plane! AGAIN THANKS!

What is the frequency that it operates at (in hertz)

The parts lists has an entry of "R2 2.2K 1/4 W" and "R1 10K Trimmer Pot"; therefore, range is probably 2.2K to 12.2K depending on trim

Is this the 17.4kHZ teen dispersal device? I just want to target those under ~25 and leave everyone else alone.

I found this devise to be an utter disappointment. You could possibly target just one person if they're too stupid to just step off to one side or the other or simply cover their ears.

Age Range	Adult
Color	Black
Team	Sonic
Material Type	Plastic or composite material
Power Source	Battery Powered
Batteries Included?	Yes
Brand	Shomer-Tec
Manufacturer	A.C. Kerman - LE
Item model number	SHSN
Product Dimensions	12.7 x 12.7 x 2.54 cm; 90.72 g
ASIN	B00ABV7OAM

Shomer-TecSonic Nausea Electronic Disruption Device

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