Features:

• Sends alert when people, vehicles enter driveway or approach mailbox
• Wireless; motion-activated; weather-resistant; 400-foot range
• Sensor installs with screw on any surface: door, post, garage
• Portable receiver has three settings: high or low chimes and ôoffö
• Operates on one 9-volt and three C-cell batteries (which are not included)

Editor Reviews:

Product Description:
Driveway Patrol Security Alarm System is an infrared sensor that alerts you when someone crosses its path. When placed across the driveway or on your porch, a pleasant chime will sound alerting you that someone has come onto your property. Driveway Patrols amazing wireless technology provides easy mobility. Simply place the sensor by the front door, garage, mailbox, or anywhere else near your home and the unit will send a signal to its receiver (up to 400 feet away)! With Driveway Patrols motion sensor activation, you will always know when someone is coming up to your house before they ring the doorbell! Driveway Patrol Security Alarm System is weather resistant, installs easily with only a screwdriver, and only needs one 9 V and 3 "C" batteries, not included.

Amazon.com Review:
When a visitor--wanted or unwanted--approaches a house on foot or in a vehicle the motion-detecting sensor unit of this warning device sends a signal to the receiver indoors, which chimes an alert. The device is wireless and has a 400-foot range. It requires three C-cell batteries for the receiver and one 9-volt battery for the transmitting sensor. (Batteries are not included.) The sensor is housed in weather-resistant plastic, installs with a screw on any surface, such as a mailbox post, garage, or door, and measures 4-1/4 inches high, 2-5/8 inches wide, and 2-1/4 inches deep. The portable receiver has an identical housing, can be set to chime high or low (or turned off), and measures 5 inches high, 3-5/8 inches wide, and 1-1/2 inches deep. --Fred Brack

Rating : - Does exactly what it says...
For the price, it does exactly what it says and does it well. I get advance notice (via beeping) that someone is approaching the front door and garage. Not a lot of bells and whistles, but works great!