XD-868 Window intercom

Features：1. Fully automatic two-way intercom. 2. Ultra-thin external extension, small in size and beautiful in appearance, the external microphone has been placed in the extension, and there is only one connection inside and outside, so the installation is simple. 3. The internal unit and the vertical microphone are integrated, which facilitates the communication with the external unit. 4. The system playback is realistic and clear, and the internal and external volume can be adjusted separately. 5. Microcomputer processing circuit, with squelch function, and completely solve the problem of echo and howling. 6. There is a recording jack, which can output internal and external two-way sound signals (with the bank teller recording).