Ultra-thin surface mounted extension FM11

Features：Call and intercom function, the microphone is placed in the handle, the call quality is clear and no echo, and the problem of howling in the intercom is completely solved; The extension is connected by patch cord, which is easy to install and maintain; Using the latest coding technology, it is safe and convenient. The handle is anti-pressing design, which is more durable; The extension can be coded online, two-core design, two-way call intercom, can be used as a broadcaster, and the handle is designed to prevent pressing.