Multiband Compression - Acoustic Echo Cancellation - Noise Reduction - Increase incoming sounds up to 40 decibels - 2.4 GHz technology for more freedom of movement - Bright visual ringer in both handset and base - Vibrating handset ringer - Battery back-up in the base - Three one-touch emergency speed dial keys - Adjustable ringer volume - Last number redial - Tone/Pulse setting - Flash, Mute and Page functions - Includes belt clip - 3.5mm neckloop jack - 2.5mm headset jack - 40 channel operation - Hearing Aid Compatible