Wireless Outdoor Strobe Flash Siren Waterproof 120dB with Red Flashing Light for Home Business Office Security Alarm System

Good quality, reliable and easy to install. Highly visible and able to run on batteries only.Batteries into 4th month now, still no need to change.Now into my 7th month, still no need to replace battery. Very good!

Should be louder other wise not bad. Fitting is easy. Its battery operated and I don't know how long they will last. I have had the batteries in for 4 months now without any problems.

Very good

Horrible the battery was low after a week. And it is very low. The volume is like a regular alarm and this is for outside.