What diameter and lenght of pvc tube to use as a cannon?

I used 1 1/4” by 6.1” long PVC pipe. That length is 10 wave lengths for 22 kHz. Works good for the dogs across the street. I also used a remote control switch to active it. Press the button for 10 or so seconds rather than leave on continually.

Hello, can this be used in a car to a avoid running over dogs and cats on the streets?

I would say NO based on my experience with it having NO effect at all on any of our neighbors dogs, wild deer, ground hogs, raccoons, squirrels, coyote etc. Very disappointed… I have heard good things about the Deer Whistles or Wildlife Warning Devices sold at any box store which are only like $5.00

Is the remote control switch mentioned by others available on Amazon? Does this come with directions (I am a novice).

Search amazon for remote outlet switch. They are pretty common and many use them to turn lamps or other devices on/off by remote. Just plug the 12 volt AC adapter into that. (The LE Power Adapter lets you hot wire with an adapter it comes with.)

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Kemo Ultraschall Power Kanone Baustein

Product ID: 295636760

Details

Brand
KEMO
Battery cell composition
Lead Acid
Recommended uses for product
Speaker
Unit count
1.0 Count
Voltage
12 Volts

⚡12-14.4 V/DC

🎶22 kHz frequency

🔋150 mA max power

43419CFA

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Sold byAmazon Cote D' IvoireDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔊 Unleash the Power of Sound!

ENERGY EFFICIENT - Max power consumption of just 150 mA, keeping your projects eco-friendly.
SMOOTH SOUND WAVES - Sinusoidal frequency curve for optimal sound quality and performance.
SILENT YET POWERFUL - Operates at an inaudible frequency of approximately 22 kHz, perfect for discreet use.
POWER UP YOUR PROJECTS - Operating voltage range of 12 - 14.4 V/DC for versatile applications.
VISUAL CONNECTION INDICATOR - LED indicator flashes when the speaker is connected, ensuring you’re always in the loop.

The Kemo Ultraschall Power Kanone Baustein is a high-performance ultrasonic module designed for various applications, featuring a flexible operating voltage of 12 - 14.4 V/DC, low power consumption of 150 mA, and an inaudible frequency of approximately 22 kHz, making it ideal for discreet sound projects.

Specifications

ASIN	B002AFL1JW
Amperage	150 Amps
Antenna Location	Speaker
Battery Cell Type	Lead Acid
Best Sellers Rank	#81,179 in Musical Instruments ( See Top 100 in Musical Instruments ) #67 in Hand Percussion Blocks
Brand	KEMO
Customer Reviews	2.7 2.7 out of 5 stars (50)
EU Spare Part Availability Duration	1 Years
Global Trade Identification Number	04024028031613
Item Dimensions	3.94 x 2.36 x 2.36 inches
Item Weight	0.02 Pounds
Manufacturer	Kemo Electronic
Model Name	M161
Model Number	M161
Reusability	Rechargeable
Unit Count	1.0 Count
Voltage	12 Volts
Warranty Description	no Guarantee

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