- The W6 amplified handsets are for added receiver volume in noisy surroundings poor line quality and for the hearing impaired. They include a carbon compatible transmitter for clear transmission and are hearing aid compatible.- The W6 volume control level is fixed until the thumb wheel is rotated.- Quick and easy installation - the Walker W6 amplified handsets simply replace your old handset.- The W6 handset is available in G (round) or K (square) styles. (Noise canceling W6-500M-NC-1 available as an optional feature.)- Color: Black