When the area around the other party is noisy and it is difficult to hear you can reduce the surrounding noise to make the speakers voice easier to hear just by pressing the dedicated button simply attach the key finderkey detector to items that you often misplace and use the handset to find them quickly and easily you can see roughly how close you are to your lost item on the lcd screen and both the handset and key finderkey detector beep when being searched for making them easy to