50dB extra loud amplification6-level tone control and noise reductionSlow-talk control in real timeAmplified digital answering machine112dB loud ringer with bright red visual ringerAmplified speakerphone with tone control4 expansion handsets can be added.The KXTGM450S is a reliable and easy-to-use phone which improves many of the problem areas that those with hearing loss struggle with. Speech is louder with 50dB amplification, clearer with background noise reduction and tone control. Fast talkers are better understood with slow talk control while conversing in real time or listening to messages on the answering machine. The loud 112dB ringer with its bright red visual will always let you know when someone is calling! The included KXTGMA45S expansion handset has all the same features of the base phone and comes with its own charging dock. Built-in battery back-up—a fully charged handset provides up to 13 hours talk time and 9 days standby. (2) Ni-MH rechargeable batteries AAA (R03) are included with base. With DECT 6.0 technology there is improved range and superior transmission between the base and handsets. You can expand up to 4 more handsets for convenience in multiple rooms (see Accessories). Additional Features:3 memory buttonsTalking caller ID, keypad and phonebookCall waiting/Caller ID15 different ringtone options2.5mm headset/neckloop jack100 phonebook entriesEnglish and Spanish LCDHearing Aid Compatible FeatureDetails BrandPanasonicUPC855347004224WarrantyOne year warrantyColorGrey / SilverWeight (lbs)3.44Battery operated?Yes (batteries required)Batteries included?YesBattery details(6) AAA NiMHCorded / CordlessCordlessLine-PoweredNoBattery backupYesExpandableYesBluetoothNoDegree(s) of Hearing LossMildModerateSevere YesYesYesAmplification (dB)50Boost overrideYesCaptionsNoTone ControlYesSpeakerphoneYesAnswering machineYesCaller ID ScreenYesTalking Caller IDYesTalking ButtonsYesPhoto ButtonsNoOutgoing speech amplificationNoEmergency DialingNoLow MobilityNo