? 2.4 GHz Operation ? Extra Large Backlit Buttons ? Visual Ring Indicator ? Extra Loud Ringer ? Battery Low Indicator Northwestern Bell Large Button Cordless Phone provides a 40 Channel Auto Scan, 10 Number Meomory. Handset Vibrates on Incoming calls. Braille Augmented Keypad. Large Backlit Keypad Buttons, Handset Speakerphone, Desk or Wall Mountable, In Use/ Charge LED Indicator, Battery Low Indicator and Chain Dialing.