EWP products feature foam rubber gaskets and boots, sealed connections, gel-filled butt connectors, as well as urethane or thermal plastic potted circuit boards with internally sealed, field-adjustable trim pots and DIP switches for easy on-site programming New Automatic Noise Canceling (ANC) feature for proper operation in noisy environments Enhanced Weather Protection (EWP), EWP products are designed to meet IP66 Ingress Protection Rating (DOD# 859) Meets ADA requirements for Emergency Phones: Automatically lights the Call Connected LED Transmits a unique location I.D. code or voice announcement Grade 2 Braille label for the visually impaired 16 second non-volatile digital voice announcer High power LED strobe and beacon visual indicator: High output / long life LED technology 4 programmable flash patterns: single, double, quad and flicker 6 programmable beacon and strobe brightness settings Advanced call progress detection