The specific function of the Deling Built-in Sub Intercom ML12-B is not explicitly described, but it is presumed to serve as a built-in auxiliary unit within Deling systems such as elevator intercom setups. It likely provides support for communication, signal transmission, or functional expansion¡ªenhancing the main unit's performance, improving system stability, or meeting specific communication requirements. This may include assisting the main unit with more efficient voice communication, data transfer, or integration with other devices. For more information, please contact customer service.
