The ISW-D8125CW-V2 Inovonics EchoStream Interface Module is an interface module and keypad that connects Inovonics EchoStream receivers, repeaters, and wireless transmitters to compatible Bosch Security Systems, Inc. control panels. Use the ISW-D8125CW-V2 in systems spanning large distances to avoid inconvenient hard-wire installations. Place radio frequency (RF) transmitters anywhere within the maximum range. Move the RF transmitters as needed without costly re-wiring.