Clarity C440 2.4GHz Cordless Phone with 40-dB Amplification and Caller ID (Black) 2.4 GHz technology for more freedom of movement Clarity Power technology makes calls louder and clearer, amplifying incoming sound up to 30 decibels 50-name-and-number Caller ID memory Bright, visual ring indicator on headset and base Large, lighted keypad for easy dialing with one 1-touch emergency dial button