Hear the Loudenlow NPN -- Click the image below
TURN YOUR COMPUTER SPEAKERS' VOLUME UP HIGH
Click here to hear the Loudenlow on your computer speakers.
Compare to Standard Smoke Alarms.
(If your computer does not play sound after a moment try
this link to
play the sound directly from your computer's Media Player.)

The Loudenlow makes a lower frequency tone which is much easier for many people to hear.
The pitch is around Middle C (250Hz) and carries throughout a house better.
Read what some customers have said.