marcomishi

I am not sure this is the right forum to ask, but I am looking for a driveway alarm. I would like to get notified whenever somebody is coming to visit. I would like the alarm to be wireless, 1 sensor should be enough. The distance between the driveway and the house is around 150 feet. This site compares different alarms: http://www.safehousetips.com/best-wireless-driveway-alarm-reviews/ What do you think about the Guardline GL2000?