The SecurityMan Air-Alarm1 DoIt-Yourself Wireless Home System Kit is a state-of-the-art security system for homes and businesses. This user-friendly alarm system is a great way to protect homes/businesses at a minimum investment. The quick and easy installation of this Do-It-Yourself home alarm system is an added advantage for users. The system alerts you of an intruder through phone calls to a series of enlisted phone numbers. This home security burglar alarm can then be armed or disarmed by simply dialing into the host using the phone's numeric keypad.