Will this work with kx-tgm420 or 450?

No. The compatible handsets for KX-TGM420 and KX-TGM450 are KX-TGA680S; KX-TGDA50W ; KX-TGDA51M; KX-TGEA20S; KX-TGEA40B; KX-TGEA40S; KX-TGFA30N; KX-TGLA40B; KX-TGMA44B; KX-TGMA44W; KX-TGMA45S; KX-TGTA61.

I purchased the 5-set kx-tgfa51 and now need additional handsets - can i add 3 more handsets or is the total 6 which only allows me to add 1 more?

Sorry I do not have this info. I ahve added 1 so I have 6 cordless phones I believe you can add more, best is to check with Panasonic. Best of luck.

This might be a silly question but... if i add the 6th handset, will my phone book work automatically or do i have to do something to get it to work?

Hi Sherrill, the phone book is automatic. If you run into issues once the 6th handset is paired contact our chat team at shop.panasonic.com/contactus

Will this be registered to kx tgd530. i lost 1 phone with model kx tgda 50.

Hello. The KX-TGFA51 will not work with your base KX-TGD530. Some models that will work with that base are KX-TGDA50W, KX-TGDA51M KX-TGDA63, KX-TGDA66, or KX-TGFA61B. -G

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Panasonic Additional Cordless Phone Handset Accessory Compatible with KX-TGF540/570/TG785 Cordless Phone Systems Series - KX-TGFA51B, Black

Product ID: 45230437

Details

Answering System Type
Digital
Brand
Panasonic
Color
Black
Dialer Type
Keypad
Item Weight
0.5 Pounds
Item dimensions L x W x H
2.96 x 2.88 x

📶DECT 6.0 PLUS tech for crystal-clear range

🔇One-touch block up to 250 spam numbers

🔋12-hour talk & standby battery life

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€ 113.02

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Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📞 Elevate your home communication game—because missing a call is so last decade!

INSTANT INTERCOM PAGING - Broadcast messages instantly to all handsets—perfect for busy households.
ADVANCED NOISE REDUCTION - Experience crystal-clear conversations with automatic background noise suppression.
POWER BACKUP RELIABILITY - Stay connected even during outages with built-in battery backup.
BILINGUAL TALKING CALLER ID - Stay informed hands-free with caller announcements in English or Spanish.
SEAMLESS MULTI HANDSET EXPANSION - Effortlessly add up to 6 handsets for full-home coverage and never miss a call.

The Panasonic KX-TGFA51B is a sleek, black additional cordless handset compatible with Panasonic KX-TGF54x and KX-TGF57x series phone systems. Featuring DECT 6.0 PLUS technology, it delivers superior sound clarity and extended range. With one-touch call blocking for up to 250 numbers, bilingual talking caller ID, and an intercom voice paging system, it’s designed for busy, modern households. The handset offers up to 12 hours of talk and standby time, includes rechargeable batteries, and supports up to 6 handsets per system for seamless expansion.

Specifications

ASIN	B071X957CC
Answering System Type	Digital
Best Sellers Rank	#99,669 in Office Products ( See Top 100 in Office Products ) #220 in Landline Phones
Brand	Panasonic
Built-In Media	One (1) Accessory Cordless Handset, One (1) Belt Clip, One (1) Charger Unit, Two (2) Rechargeable AAA NiMH batteries
Color	Black
Compatible Devices	KX-TGF540B
Customer Reviews	4.4 out of 5 stars 539 Reviews
Dialer Type	Keypad
EU Spare Part Availability Duration	7 Years
Enclosure Material	Plastic
Global Trade Identification Number	00885170317208
Is there Caller ID	Yes
Item Dimensions	2.96 x 2.88 x 1.6 inches
Item Type Name	Cordless Handset Accessory
Item Weight	8 ounces
Manufacturer	Panasonic
Material	Plastic
Mfr Part Number	KX-TGFA51B
Model Number	KX-TGFA51B
Multiline Operation	Multi-Line Operation
Number of Batteries	2 AAA batteries required. (included)
Phone Standby Time	12 hours
Phone Talk Time	12 Hours
Power Source	Battery Powered
Recording Capacity	18 Minutes
Telephone Type	Cordless
UPC	885170317208
Unit Count	1.0 Count
Warranty Description	One year parts & labor

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