Do you want the alarm to detect both people and vehicles, even animals? Trees, walls and solid blockages as well as other wireless devices running on the same frequency as the wireless alarm can be causes for interference.
Ask Questions
When picking out the device, it would be a good idea to ask the technician some important questions about the driveway alarm. Also ask if you can make different recordings for different transmitters in case you will want to get multiple wireless driveway alarms.
Decide if You Would Like For the For the Device to Be a Standalone Alarm
Nowadays, it is now possible to integrate all alarm systems to a central automation system. Transmission distance is basically the distance between the indoor receiver and the vehicle sensor. A good wireless intercom system will be able to transmit signals of up to 1,000 feet, assuming the area is an open field, without any interference. However, with the presence of interference (like doors, walls or trees), a good wireless alarm system should be able to transmit signal to approximately 300 feet.