From the manufacturer

Talking Caller ID in English and Spanish
When the phone rings on one side of the room and you're sitting on the other, there's no need to get up. Advanced text-to-speech announcements clearly tell you who's calling.
Features
Easy Call BlockWith dedicated Call Block buttons on both base unit and handsets, it's quick and simple to block telemarketers, rob callers and other unwanted numbers. A single push of the button instantly registers numbers into the system's 250-number call block database. |
Voice PagingWake kids for school in the morning and let everyone know when dinner is ready in the evening with Panasonic Voice Paging. More than a traditional intercom, VP makes it easy to send clear, simultaneous announcements to every handset in the house, even when family members don't respond. |
Large White Backlit DisplayA large 1.8-inch white-backlit LCD and comfortable, efficiently positioned backlit numeric dial keypads and buttons make home and home office calling quick and convenient in any light conditions. |
Hear Calls from Noisy PlacesWhether someone's calling from a busy city street or inside from a raucous room, Noise Reduction automatically suppresses background interference while also enhancing voice tones for clearer, more comfortable conversations. |
Speakerphone ConvenienceConnect and converse hands-free with crystal-clear 2-way, full duplex speakerphone convenience designed into the handsets. |
Keep Tabs on the BabyWith the baby monitor feature, you'll always know your child is safe. When the child wakes up or starts crying, a monitoring handset in the baby's room sends an immediate alert to the system's base unit and any phone or cellphone number you store in the handset. |
Find Lost KeysAttach an optional Key Detector to your key ring and never lose keys again. Simply activate the detector's beeping alarm from any KX-TGE433B handset to instantly track down lost keys from up to 200 yards away. |
Secure, Long-Range SignalDesigned with DECT 6.0 Plus, the KX-TGE433B system ensures clear sound and added reliability throughout the home. DECT 6.0 also provides signal security to deter eavesdropping and won't interfere or conflict with routers or other devices. |
*1 Requires subscription to a Caller ID service offered by your provider / telephone company. *3 Optional handset may be required depending on the model. *5 The base unit gets temporary power supply from a cordless handset in the case of a power outage. *6 Requires number registration in the call block list. |
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KX-TGE433B | KX-TGE233B | KX-TGE463S | KX-TGE445B | |
Answering Device / Speakerphone | Yes / Yes (Handset), Full Duplex | Yes / Yes (Handset), Full Duplex | Yes / Yes (Handset), Full Duplex | Yes / Yes (Handset), Full Duplex |
Talking Caller ID / Call Waiting | Yes (English/Spanish) / Yes *1 | Yes (English) / Yes *1 | Yes (English/Spanish) / Yes *1 | Yes (English/Spanish) / Yes *1 |
Bluetooth Capability / Bluetooth Class | No / - | No / - | Yes / Class 1 (Range of 330ft) | No / - |
Handsets Included | 3 | 3 | 3 | 5 |
Number of Stations Expandable | 6 | 6 | 6 | 6 |
Headset Jack / Wall Mount / Belt Clip | Yes / Yes (Charger) / Yes | Yes / Yes (Charger) / Yes | Yes / Yes (Charger) / Yes | Yes / Yes (Charger) / Yes |
Voice Paging | Yes (Handset to Handset) | No | Yes (Handset to Handset) | Yes (Handset to Handset and Base) *3 |
Power Back Up Operation | Yes *5 | Yes *5 | Yes *5 | Yes *5 |
Easy Call Block | Yes (250 numbers) *1*6 | Yes (250 numbers) *1*6 | Yes (250 numbers) *1*6 | Yes (250 numbers) *1*6 |
Phonebook Memory (Name and Number) | 100 items (16char / 24digits) | 100 items (16char / 24digits) | 3000 items (16char / 24digits) | 100 items (16char / 24digits) |