directly from manufacturer Linear DVS-2400 24-Channel Supervised Wireless Security Console The Model DVS-2400 24-Channel Supervised Wireless Security Console is a wireless console intended for apartments, condos, townhouses, homes, and any other sites that require 24 zones of protection or less. The system features a full-function, built-in keypad with an LED display of each sensor/transmitter. The DVS-2400 is a uniquely-styled, ultra-compact, UL listed console with a concealed antenna for surface, flush, or tabletop mounting. The heart of the console is a superheterodyne radio receiver. A rechargeable back-up battery also fits inside the console.The Model DVS-2400 has six operating modes and can be configured for one-button operation, for eight user codes (including duress).An optional plug-in Model VB-2 board adds valuable communications capabilities, including voice prompts, touch-tone telephone access, and a two-way voice link for central station monitoring. Compatibility with the $326.32