The equipment allows natural and fluid communication out loud, without raising your voice and totally hands-free. The microphone incorporates acoustic echo cancellation (AEC) and noise reduction to improve speech intelligibility. Volume control makes final adjustment easy at the time of installation. The units have an IP 33 degree of protection, are small in size (108 x 90 x 24 mm), can be attached to the partition in a moment using the built-in self-adhesive, and are quickly connected with the included cables. Also included is the 12V DC power supply. The main unit consists of a directional microphone, speaker, power input, power switch, communication activation key, volume control and LED connection indicator. The secondary unit has a microphone, speaker and the operation LED.