Wall-Mount Design for Indoor Use Standard Telephone Operation Braille, Chrome-plated Keypad Brushed Stainless Steel Housing Volume-control Handset with 29-inch, Swivel Armored Cord Ringer with Loudness Control Less than 3 ½-inch Depth (Measured From Mounting Surface) Dry Contact Closure Output UL/CSA 60950/60950 Compliant FCC Part 68 Certified ADA Compliant for Corridor Installation