Reliable stainless steel handsfree panel speakerphone with pushbutton for ring-down operation and red/green LED light for visual indication of call progress. Phone relies on external equpment to control calling. Press button to disconnect call. Ability to block or allow incoming calls and provide call duration time-out from 1-9 minutes or no time-out. Telephone can not be left off-hook, as it detects when called party hangs up and resets itself. Equipped with a red push button, EMER PHONE Braille plate, tamper resistant security screws and weatherproof, puncture resistant speaker and microphone. Optional 371-011 mounting box, 371-012 frame available.