Wireless burgular alarms and preventing theft are proved to be very effective. Read more at http://www.onlinesecurityauthority.com/1226/installing-your-very-own-wireless-burglar-alarm-system/
After looking on the Amazon website there was an advert for Mighty Mule offering wireless driveway alarms. Dakota Alert are another manufacturer that offer wireless driveway alarms.
There are two main types of wireless house alarms. One is the perimeter protection wireless house alarm and the other is the motion detector wireless house alarm.
Big home retailers, such as Home Depot or Lowes, carry wireless smoke alarms at a variety of price points. Wireless smoke alarms can also be found online at www.amazon.com/.
The brand Visonic sells many electrical security products. Some of these include burglar alarms, smoke alarms, wireless transmitters and wireless keypads.
There are cheap and effective door alarms. One can find door alarms at retail stores like Super Store, Wall Mart and Target. One can also purchase door alarms from online sites Amazon or eBay.
Modern-day alarms are wonderfully effective at fending off intruder either by using motion detecting lights or audible alarms to rapidly alert the property owner. Most alarms can also be connected with the local police department.
Some companies that offer wireless burglar alarms are ADT, Safemart, and Simplisafe. These companies allow their customers to arm their alarm far from home as well as 24/7 support.
You may be surprised to learn that virtually all home smoke detectors are "wireless", in that they are battery-operated and do not hook into the house wiring in any way. Most moderately priced smoke alarms are very effective, and placing one on every floor near or on the ceiling (particularly close to sleeping areas and heat sources such as stoves and furnaces) not only makes your home safer, but in many jurisdictions you are legally required to have them.
You can read reviews for a Yale Wireless alarm online on the official Yale website. They offer various reviews both from people as well as professional wireless alarm reviewers, which can help you choose the correct alarm for you.
They use sonic waves to detect things. They are used to sense volume of liquid in a tank as well as in humidifiers, sonar, medial ultrasonography, burgular alarms and non-desctructive testing.
Home security alarms are very effective at deterring invaders because they are linked to a security center. Another way they are effective is they are make loud noises whenever they are activated.
The related link below is the most detailed and comprehensive site comparing both wireless and wired bedwetting alarms.