Rodann Airchime

Made in the USA
The Airchime is designed to work when low frequency sound waves are detected by the pressure change that occurs during the opening or closing of an exterior door within up to a 3,000 square foot facility. The unit plugs into any wall outlet and allows for the chime box to be hung in a verticle or horizontal position. This unit does not need to be near the door being protected. You may even place this unit in other rooms with a closed door in-between.
Now Available for $79.95