We purchased this model because we had such great success with a similar model of Panasonic portable phone, which we had for well over 10 years. We screen all calls by listening to the caller's message coming over the base unit speaker, if we're not near the phone to view the caller ID information. The base unit has extremely low audibility; you can hardly hear the incoming caller's voice announcing who they are and we have the volume turned all the way up as directed in the manual. If you miss calls and play back the messages, the voices are loud and clear as it should be, but not otherwise. Also, unlike our previous phone, we are not able to program different ring tones to quickly identify family members or business partners when they call, enabling you to pick up the phone before the call goes into voice mail (if you're away from the phone itself and not able to view caller ID info.). We wasted our money.