Good siren. Red color is phase, blue is zero. But the sound is not so strong. I took it earlier on 12 V of similar performance-so there I yelled so that I would scream. I understand that the less voltage, the stronger the sound, but then you need a transformer, and this is extra. Money.

Amazing... the siren is very very loud, extremely loud. Your ears will hurt if you stand near it for more than 10 seconds. for this price... this is just amazing

Very good buy. Small but very loud. WITH a small distance up hurting ears. Recommend this product and salesman. Shipment dotarła pretty quickly well packaged.

Responsible seller, product is published, arrived very fast in Chile. It hasn't been tested yet, but it's but it works.

I did not expect at this weight and consumption of 300 Ma of such volume!