How you activate this siren, is there a button on this siren or need a signal, what kind of signal

You would need to connect it to a compatible alarm control panel. The alarm panel provides the control signal and power to the siren.

can this be wired in with stranded wire to our Honeywell /ademco vista 20p? also usable outdoor but under cover?

Yes these are standard sirens for any Ademco (and many other) systems. Yes they can be used outside covered from the weather such as under an eve. I have mounted then inside eve vents and attic vents too - Ron

Can multiple Wave-2 sirens be connected to a Vista 20p? If so, how are they wired (serial or parallel)?

I don't think they can be. I tried both ways and neither worked. I only have 1 of the 2 horns wired on my system. I couldn't get both to work I think they pull too many amps for the little system. If you do find a way please let me know

Seriously wish this had a flashing light is there one just s few dollars more that’s WiFi Soren with left?

Just know it isn't that quick. Even if you had wifi, you would still need software to connect to wifi and a relay control mechanism to provide power to siren. I uses a PIR (passive infrared sensor) plus relay to activate mine.

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WAVE-2 Two Tone Siren

Product ID: 368817533

Details

Brand
Honeywell
Colour
White
Power source
DC Power
Product dimensions
12.7L x 10.2W
Voltage
12 Volts

🔊106 dB sound pressure

🔌500mA max current draw @12VDC

🛠️Hinged case for tool-free install

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Description

🚨 Make your security impossible to ignore with Honeywell’s WAVE-2 Siren!

POWERFUL ALERT - Blasts a commanding 106 dB sound pressure to ensure no alarm goes unnoticed.
COMPACT SLEEK - Standard single gang box size with a modern two-tone look that blends into any environment.
VERSATILE MOUNTING - Corner or ceiling mount with zero extra hardware—flexibility that fits your space.
RELIABLE PERFORMANCE - Low 500mA current draw at 12VDC keeps your system efficient and dependable.
EFFORTLESS INSTALLATION - Unique hinged case design means no disassembly—get it up and running in minutes.

The Honeywell WAVE-2 Two Tone Siren delivers a robust 106 dB alarm sound with a low 500mA power draw at 12VDC. Its innovative hinged case design allows quick, tool-free installation and supports versatile corner or ceiling mounting without extra hardware. Compact and stylish, it fits standard single gang boxes and offers reliable, professional-grade security alerts.

Specifications

ASIN	B0006BCCAE
ASIN	B0006BCCAE
Audible Noise	106 Decibels
Best Sellers Rank	#140,342 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #177 in Security Horns & Sirens
Brand	Honeywell
Built-In Media	Alarm
Color	White
Control Method	Touch
Customer Reviews	4.6 4.6 out of 5 stars (688)
Customer reviews	4.6 4.6 out of 5 stars (688)
Date First Available	15 November 2005
Is Discontinued By Manufacturer	No
Item Dimensions L x W x H	12.7L x 10.2W x 5.1H centimeters
Item Weight	1 Pounds
Item model number	WAVE2
Manufacturer	Honeywell
Manufacturer	Honeywell
Mfr Part Number	WAVE2
Model Number	WAVE2
Mounting Type	Wall Mount, Ceiling Mount
Power Source	DC Power
Product Dimensions	12.7 x 10.16 x 5.08 cm; 453.59 g
UPC	781410193437
Unit Count	1.0 Count
Voltage	12 Volts

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$60.87

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

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