MayDay Earthquake Alarm with Early Detection Feature

It does work. The alarm sounded in a 3.7 earthquake

Muy buena alarma, vivo en Colombia en una zona sísmica y suena bien en caso de temblores por encima de 4 suena

Excelente producto, muy bueno. Lo uso en PR pues tenemos probabilidad de fuertes sismos en cualquier momento. Tiene un chillido fuerte al momento de ocurrìr un sismo para que puedas resguardarte y salvar tu vida y la de tu familia.

I live in Puerto Rico and after we got hit 6.5 earthquake, I said, I need to try this device. We actually have earthquake every day but is just from 2.5 to 3.2 not a big deal after feel the big one 6.5. So last night like 12:45 am, my son and I listening the alarm, and my son said, is that is the earthquake Alarm that you bought? And I said yes, but I don't know if is working. Then like after 10 seconds after the alarm, we got hit by earthquake almost scale of 4 but that happened like a one mile away. So this device really work. You can have like a 10 seconds to get out of your house.

Finally, I can write a review of this product because last night we had a 6.4 R earthquake in South Peru and the device worked perfectly fine, I tried to adjust the calibrator to make the sound for >4.5 R quakes and it works. Here is a video of the recording from last night