SecurityMan Air-AlarmIIE is a wireless LED touch pad security alarm system kit for home and business. It is easy to use protection for home or business at a minimum cost of investment. Do-It-Yourself installation and monitoring alarm system without monthly fees is a key benefit for users. The system alerts the owner by phone through a series of enlisted phone numbers. The owner can then dial into the host to arm or disarm using the phones numeric keypad. Air-AlarmIIE system can be upgraded by adding up to 60 wireless sensors, sirens, and up to 10 remote controllers. Note: An active phone line is NOT required for the alarm system to work. However, for the dialing features to work, an active phone line (LAND line) is required. Fully compatible with Vonage VoIP model VDV22-VD. Not compatible with other digtial phone service (VoIP; voice over ip) such as MagicJack, ComCast, Fios, etc. Fully compatible with Verizon Home Phone Connect Box.