Surface mount design, Type-3R - Telephone line powered, (No battery back-up or external power required) - Large "Palm" EMERGENCY push button for one-button autodial - CALL push button for keypad use - Braille sealed chrome plated keypad - Standard or SMART Operation - Three number rollover - programmable - Automatic answering - (2) Auxiliary outputs for peripheral equipment control - Cast Aluminum Enclosure - Yellow epoxy finish - UL/CSA 60950 Compliant - FCC Part 68 Certified - ADA Compliant