Eyez-On Envisalink EVL-4EZR IP Security Interface Module for DSC and Honeywell (Ademco) Security Systems IMPORTANT: Quantum Networks is an authorized seller of Eyez-On products. Please note that E-SAVER, D.H.F., Eat Your Vegetables, Alarm Liquidators, Mount Deerfield and Keystone West are NOT authorized sellers of Eyez-On products, and warranties will NOT be honored. Please purchase from authorized sellers only. STAY CONNECTED: EnvisaLink 4 will allow you to receive text and email messages as well as control your Honeywell Vista and DSC security systems through the internet. SMARTPHONE COMPATIBLE: The EnvisaLink 4 also provides access through a virtual keypad using an iPhone, Android or Blackberry. BROWSER AND VOIP FRIENDLY: It allows you to view the status of and even control your alarm panel through a standard web-browser or smart-phone. VOIP Friendly. PANEL COMPATIBILITY: Honeywell Vista Panels (Vista20P, 21iP, 15P, 10P, 128, and 250.) DSC PowerSeries (1555, 1555 MX, 1575, 5010 (832), 5020 (864), 1616, 1832, 1864)