DECT 6.0: transmission quality and range are improved by increasing the frequency of error correction up to 80x</br>Large, 1.8-Inch White Backlit Handset Display</br>Find misplaced cell phone with a button on the base; Receive voicemail alerts at home, office or away with TAD</br>Dial easily with large buttons on handsets and base, tone equalizer, intelligent eco mode and power back-up operation</br>Includes 4 cordless handsets</br></br>Product Description</br></br>The Panasonic KX-TGE234B DECT 6.0 Plus Amplified Expandable Digital Cordless Answering System, with 4 handsets, features extra-large buttons and amplified volume with a dedicated volume key, ideal for those who have a hard time seeing or hearing. Enhanced noise reduction suppresses background noise around the caller while simultaneously enhancing their voice so it's easier to hear them if they're calling from a noisy location. To maximize clarity, the Tone Equalizer control actually lets you adjust bass, mid-range or treble tones in a caller's voice. Plus, a powerful battery back-up system keeps you connected even when the power goes out.</br><br/>http://www.amazon.com/gp/product/B00ISKW534