WOOT via Amazon has Guardline 1/4 Mile Long Range Wireless Driveway Alarm Motion Sensor for $99.99 with free shipping, you can save $109.01 at checkout. Sale ends in 24 hours.
- Easy do it yourself installation.
- Set includes one sensor/one receiver
- Detects motion in up to 4 different zones, and up to 4 sensors per zone.
- Sensor runs on (4) AA batteries for up to one year
- Receiver can be plugged in using included AC adaptor
- Sensor can detect motion up to 40 ft away.
- Receiver includes a 12-volt relay to add wired external alarms, chimes, or bells