Anti-interference window intercom system with microphone and speaker for hospital bank counter

Upgrade function: When the internal unit doesn't want the external unit to speak, you can directly mute the external unit's microphone. Similarly, if the internal unit doesn't want the external unit to hear it, you can mute its microphone.
High-quality speaker for the main unit and extension, high-sensitivity microphone, longer metal tube microphone for two-way communication.
Sleek design; the main unit is made of luxurious aluminum alloy, and the extension unit has an internal microphone. Single-cable connection and simple installation.
Adjustable volume with a separate switch; automatic two-way communication without pressing any buttons; dual-track tuning with indicator light. Replacement recording socket for banks.
It is suitable for bank windows, ticket offices, hospital windows, post office windows, security windows, embassy visa offices, securities companies, hospitals, and stations where security glass is installed.