Automatic hands-free two-way Interphone Intercom, host long microphone, easy dialogue, automatic channel conversion. Host of high-quality speakers, the sound loud and clear realistic. Interphone Intercom with microcomputer voice processing circuit, with interlocking channels, consumers Tone function, solve the problem of echo howling can be long hours.Window intercom JT-F07 silver aluminum exterior color host extension, extension extension plastic plating(Optional triangular or circular plastic plating extension extension).The Interphone Intercom has beautiful appearance, small size, simple installation, convenient and practical.Inside and outside the volume can be adjusted or turned off, there are two-channel audio output, with monitoring facilities in the Interphone Systems.This Interphone System is the best choice for you!