The microphone can be rotated 360° at will, it is not easy to break.

The microphone is sturdy and durable, and the long hose microphone tube can be bent at will without dead ends, which can realize calls at any angle.

Insert the plug of external loudspeaker box into the loudspeaker jack of the main unit.

The outside speaker has a sticky backing that can be stuck to the window glass.

Window speaker intercom system independent volume control , inner and outer volume knobs can adjust the volume separately.

There are three buttons on the main unit, two volume adjustment knobs and a power switch.

The host has a recording interface, which can be connected to external recording equipment to meet your different office needs.

1. May the main machine have a close distance with the speaker.

2. You can make them in a longer distance so that they will not have the noisy.

1. May because that the outer speaker facing to the main machine .Then,it will have noise.

2. Don’t make them face to face. Please make them back to back and have a longer distance.

3. When one is speaking, the other to grab the words will be suppressed.