White Noise Back Up Alarm, our very own 105 decibel alarm is very effective in close proximities. It delivers a very loud intermittent white noise signal nearby, yet doesn’t bleed over to other areas. Great for construction or utility jobs in neighborhoods where a beeping tone might be not welcome on a continual basis. Try one today. WN105Regular price: $89.99Sale price: $59.99 Customer Pays All Shipping Charges. Pay securely with your Visa, Master Card, Discover/Novus or PayPal with our easy checkout! Note: Purchase orders will be accepted only by municipalities and pre-approved before check out completion and Purchase Order Number received. All others will be immediately rejected and transaction voided. Place your order by Internet, Phone or stop by our Store for the same low internet prices!