Original my-e330 window interphone counter interphone bank interphone

About Product:2. Ultra-thin external extension, small size, beautiful appearance, the external microphone has been placed in the extension. The internal and external only one line, Simple installation. 3. The Integration of internal machine and vertical microphone facilitates communication with external machine. 4. The system playback is realistic, The clear, 5, microcomputer processing circuit, with static noise function, and completely solve the echo. Noise problem. 6. There is a recording jack, which can output internal and external dual channel sound signals (with bank teller recording).