The EM-SMG105 Sound Masking Generator is the any brand of amplifier perfect solution for masking needs in offices or facilities where voice privacy enhancement is desired. The SMG105 generates a soft pink noise that acoustically sounds very much like air-handling ducts or vents. It can provide voice privacy at an affordable cost. high security The SMG105 has been designed to be compatible pseudo-random with any brand of amplifiers. Just hook-up its’ output sequence signal to the input of your amplifier, and plug in the 24VDC power supply that comes with the SMG105. Sound masking just became easy and affordable. simple installation The pseudo-random sequence that feeds the pink noise & affordable low-pass filter on the SMG100 card, exceeds 1.5 days in length before the sequence is repeated. This provides a realiable high security solution for your noise masking.