MayDay Earthquake Alarm with Early Detection Feature

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.

Exelente

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.

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

Gracias a Dios no ha temblado fuerte. Espero y funcione para cuando pase

The pendulum is very sensitive and works great however this is negated by the fact the mounting system is terrible bordering on comical. You can tell this thing never saw a desk of an engineer or product designer by the mount and battery compartment. I have five of these between home and work and within a month all have fallen off the wall and caused false alarms, twice it happened the middle of the night. They need a revision with a proper mounting tab not just some Velcro and tape. Do better, lives depend on this.

Excelente dispositivo para detectar cualquier sismo. Los recomiendo al 100%. Es tan ruidoso que te darás cuenta cuando ocurra un sismo. Lo único que puedo criticar, es que usa batería de 9V. Debería de traer una batería recargable, luego de ahí todo super.