Can automatically light the "Call Connected" 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 “INFO” numbers Cycles through backup emergency and non-emergency numbers on busy or no-answer 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°F to 130°F) VKE160040A