Can you please provide a link to the power adapter that's needed for connecting to the 110v electrical socket?

It's only two wires(anode:red,cathode:black) without socket.

Can it be used for with a ansul fire system for a restaurant ?

Can answer that question, I would check with the local fire marshal and see if they would approve . I don't think it will meet code.

I bought one some months ago . I'm extending the cable , because is too short , but is not working with the extension . Incredible , but any ideas ?

The long the wire (extension), the more voltage drop-off you will have. Get it too long and there isn't enough voltage at the end of the wire meeting the device.

What I s it that I can I use to power it

You can use any 12 Volt DC only power source such as a 12 Volt battery or a 12 Volt DC power supply. Im sure you can find these items on Amazon. Hope this helps

Voltage	12 Volts
Control Method	Touch
Noise Level	110 dB
Mounting Type	Wall Mount
Manufacturer	Bestgo
Part Number	BT-103
Item Weight	3.52 ounces
Product Dimensions	2.76 x 1.89 x 4.72 inches
Item model number	BT-103
Is Discontinued By Manufacturer	No
Size	103 Siren
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

DC9 to 12V Wired Strobe Siren Red Light Sound Flash Buzzer Siren Home Security Alarm System Electric Security Siren 110dB@12V DC

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