Amplified K-Style Handset， Black， Works for most Avaya Phones (useful for the hearing-impaired)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Works on most Avaya Phone: MLS12， MLS18， MLX10， MLX10D， MLX10DP， MLX16DP， MLX20， 8410， 8410D</li><li>Built in Adjustable Volume Control Dial &amp; battery</li><li>ONLY SOLD BY GLOBAL SOURCE DIGITAL TECHNOLOGIES</li><li>Six (6) Months Limited Protection</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31lpF2xhXwL.jpg" noproxy>