Meet the Guardline Smart Driveway Alarm: a motion sensor and detector that helps you keep your home protected. It can be expanded with up to 16 sensors. You get over 30 chimes to choose from. The device has a range of 500 ft. The outdoor sensor has a weather resistant seal. You will need 4 AA batteries to power the system.
The motion detection lets you detect action in up to 4 different zones. This security system costs under $100 at this time.