Meets ADA requirements for Emergency Phones:- Can automatically light the In.Call ConnectedIn. LED for the hearing impaired- Transmits a unique location I.D. code or voice announcement- Grade 2 Braille label for the visually impaired- Non-volatile digital voice announcer with 16 seconds of voice memory- Advanced call progress detection- Handsfree operation- Phone line powered- Non-volatile memory no batteries required- Marine grade 316 stainless steel prevents corrosion on stainless models- Dials up to 5 emergency numbers- E-1600-20A and E-1600-52A dial up to 3 non-emergency In.INFOIn. numbers- Cycles through backup emergency and non-emergency numbers on busy or no-answer- Enhanced Weather Protection EWP, EWP products are designed to meet IP66 Ingress Protection Rating- Hangs up on CPC, silence, busy signal, dial tone, time-out or touch tone command- Programmable to auto-answer on incoming calls- Remotely programmable- Extended temperature range -15 Degrees F to 130 Degrees F