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  • Panasonic KX-TG6645B DECT 6.0 Cordless Phone with Answering System, Black, 5 Handsets
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Panasonic KX-TG6645B DECT 6.0 Cordless Phone with Answering System, Black, 5 Handsets

1,443 customer reviews
| 69 answered questions

Available from these sellers.
5 Handsets
  • DECT 6.0 Plus Technology
  • 5 Handsets,Connections: 1 x Headset jack
  • Single Line
  • Cordless Phone
  • All-Digital Answering System Included
2 used from $110.00 1 refurbished from $134.46

Technical Details

Size: 5 Handsets
  • Speakerphone
  • Caller ID
  • Alarm Clock

Product Description

Size: 5 Handsets

Product Description

Panasonic KX-TG6645B DECT 6.0 Plus Digital Cordless Answering System w/5 Handsets. The phone comes with:120 VAC, 1 AC adaptor for base, 4 AC adaptors for each of the other 4 chargers. It does not support 220V.

From the Manufacturer

Introducing the Panasonic KX-TG664XB

The Panasonic KX-TG664XB Expandable Digital Cordless Answering System with a Dual Keypad, is perfect for your home or home office environment. DECT 6.0 Plus technology ensures fantastic sound quality and outstanding range making sure your calls all come through crystal clear.

KX-TG664XB Phone
Further and further still...

Clarity even at extended range is a hallmark of Panasonic cordless phones. The KX-TG664XB features Range Boost technology that extends transmission ranges by up to 20% compared to previous generation phones so you can keep talking as you keep walking.
Just some of the features on the KX-TG664XB
DECT 6.0 Plus Technology
Reversible Handset Design
Hands-Free Speakerphone on Base & Handset
Talking Caller ID *1 *2 *3
Up to 4-Way Conference Capability
Intelligent Eco Mode
Range Boost
Power Back-up Operation (Handset)
Tone Equalizer
Call Block *1 *4
Dual Key Pad
Silent Mode
Speed Dial on Base
White Backlit LCD on Handset
A phone for every area of your home

The KX-TG664XB is expandable up to six additional handsets all controlled by the same base. Add a phone in every room of the house or allow multiple users to work simultaneously in a small office. Each additional handset (KX-TG664XB (link to Amazon page)) comes equipped with a full feature set so you will never miss a call again.
Power Back-up

No Power? No Problem. These 2011 Panasonic phone models all come equipped with a powerful battery back-up system that kicks in when the power kicks out. You will still be able to make and receive calls with KX-TG660 series cordless handsets.
Talking Caller ID

Find out whose calling without even picking up the phone. The Panasonic KX-TG664XB uses text-to-speech technology, to announce caller ID information in between rings. What could be more convenient?
Dual Keypad

The KX-TG664XB features the added convenience of a keypad on both the handset and the phone base. It allows you to dial, use speakerphone and retrieve messages all without using the handset.
Intelligent Eco Mode

The KX-TG664XB automatically lowers the power consumption when you’re using the handset close to the base unit. Not only does it extend the available talk time, its good for the environment. When less power is used by the handset to communicate with the base unit, battery life is prolonged which results in less frequent charging and can result in fewer batteries in landfills.
Technical Specs
General Color: Black
Frequency / System 1.9 GHz / DECT 6.0
Number of Channels: 60
Expandable up to Six Handsets
LCD Language: English / Spanish
Call Block *1*4
Silent Mode
Light-Up Indicator
(Ringer / Charge Indicator) (Amber)
Ringer ID *1*2 Categories (9 Category)
Menu Operation
Intelligent Eco Mode
Rubber Grip
Range Boost
Reversible Handset
Tone Equalizer
Power Backup Operation
Caller ID / Phonebook Caller ID / Memory *1 / 50 items
Call Waiting Caller ID *1
Talking Caller ID (Base & Handset) *1*2*3
Voice Mail *1
Chain Dial
Handset Functions LCD (Handset) 1.8 inch Full Dot Mono 103 x 65 pixels screen
LCD Backlit Color: White
Lighted Handset Keypad (Amber)
Ringer Volume 6-Step + Off
Redial Memory (Handset) 5-History (Name*5 & Number)
Hold - (MENU / Soft key)
Mute (Soft Key)
Receiver Volume 4-Step
Speakerphone Volume 6-Step
Intercom (Handset to Base)
Intercom (Handset to Handset)
Conference Call with Outside Line Up to 4-Way
Alarm (Wake-Up Alarm)
Battery Rechargeable Ni-MH Batteries (AAA x 2)
Talk Time 13 Hours (max) (in Eco mode on)
Standby Time 11 Days (max)
Charge Time 7 Hours
Headset Jack
Answering System Answering System
Total Recording Time (ICM + GM + Memo) About 18 min
Message Alert (Light-Up Indicator)
Speaker Volume (Base Unit Speaker) 8-Step + Off
Remote Operation from Handset / Outside Line (DTMF)
Base Functions LCD (Base) 2-Line
Base Phonebook Memory (Name & Number)
50 items (16 char / 24 digits )
Redial Memory (Base) 10 TelNo, Name from Phonebook
Digital Speakerphone
Handset Locator
Ringer Volume 6-Step + OFF
Wall Mountable

*1 Requires subscription to name-and-Number Caller ID, Call Waiting and/or Voice Mail service. *2 Requires registration in Phonebook function. *3 Name pronunciation may vary. *4 Requires number registration in the Call Block list. *5 Requires registration in Phonebook function. “Name”is displayed only when calling from the Phonebook or Caller List. ICM = Incoming Message. GM = Greeting Message.

Product Details

Size: 5 Handsets
  • Product Dimensions: 9.5 x 7.7 x 6.7 inches ; 4.4 pounds
  • Shipping Weight: 4.8 pounds
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B004N4Q486
  • Item model number: KXTG6645B
  • Batteries 2 AAA batteries required.
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (1,443 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: March 21, 2011

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

850 of 862 people found the following review helpful By M. A. Shoemaker on May 18, 2011
Size: 5 Handsets
First, one of the reviews above states they have used these phones for years, but this series was first shipped in May 2011, so this review must be for a prior generation. And it is important, because this series has a lot of pluses that the prior generations did not have.

Second, we have used Panasonic phones (with very few exceptions) since their old wired phones! This product is replacing an earlier generation wireless series with 4 phones. We had two batteries in the old units starting to fail, so rather than buy replacement batteries for 5 year old phones, I bought this and am not disappointed at all. Some of the key reasons this may be the best Panasonic phone system yet are:

> The screen is so much better to read. I wear reading glasses and the old screens were tough to read without them, but the high contrast, white backlit screens on these phones are so much easier to read!
> The menu systems seem much better. Much of what you want to do is handled by the soft-touch buttons with screen readouts so rather than searching the small text below some of the buttons, the choices are much easier to see on the screen.
> The reception is so much better and covers a longer distance than before. Our old phones (5.8mHz system) would get harder to hear on both ends if we walked to the other end of the house and walking a few steps outside was sure to cause a drop, but this new DECT 6 works anywhere in the home and far outside with no noticeable diminution in sound quality. (Pana makes a range extender optional piece you can add to the system, but I cant see any use we would need for it!)
> One of the best new features is the ability to use one of the handsets for temporary battery backup during a power outage!
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452 of 457 people found the following review helpful By JustAnotherEngineer on May 23, 2011
Size: 5 Handsets Verified Purchase
This cordless phone and answerer are new for 2011 and the performance is outstanding. Minor changes for 2012 and 2013. Read on.

You can buy this phone/answerer in five configurations: KX-TG6632B (two cordless phones and answerer), KX-TG6633B (three cordless phones and answerer), KX-TG6643B (three cordless phones and answerer WITH keypad), KX-TG6644B (four cordless phones and answerer WITH keypad), KX-TG6645B (five cordless phones and answerer WITH keypad). All have the same handsets and the answerer differs only in that some come with a keypad and others without. None of the answering machines have a hard wired handset. Otherwise the features and performance remain the same.


Near perfect display: Readable with no back-light and with the back-light on (hit any key) there is a brilliant white background with purple text using very large characters. This is the best display I've ever seen. The fonts are near perfect and the text is huge!

Range - outstanding: Past cordless phones have proven unreliable just outside my garage door. I had perfect reception there and decided to experiment. My driveway is 250 feet long and I still had reception 250 feet from my house! Stunning! Yet at the farthest distances some hiss became evident.

Voice quality - outstanding (yet I do wish I could turn the volume up just a bit more from its highest setting). Also there is no hiss or other audio anomalies.

Battery life: the batteries are standard NIMH AAA which are easily replaced. After a few days the meter shows no discharge. However after 5 to 7 days these phones need to be recharged so I really doubt the claimed 11 days of stand-by as quoted in Panasonic's specifications.
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202 of 206 people found the following review helpful By M. Hewitt on April 29, 2011
Size: 4 Handsets Verified Purchase
Gone are the days of needing phone wires throughout your house. I had one old cordless phone as well as several corded phones around the house and out in my shop, all of them wired to the wall. I decided to upgrade to this system. It was a good move.

The set up was simple. An hour with the directions to get all my settings the way I wanted them and punch in all my stored numbers and I was in business. Now the only wired connection is to the base unit which sits on my desk. I can put the others handsets anywhere.

The sound clarity is fantastic and equal to any corded phone. The range is way beyond what I need, so even the phone out in my shop works great. The display is easy to read and the menu very intuitive even if you don't have the owners manual handy. I really like the intercom feature where you can transfer a call to someone else in the house without having to yell for them to pick up the phone. It will ring what ever handset you want. I also like the feature that lets you silence the ringer according to a preset schedule, so now the phone in my bedroom won't ring between 8pm and 8am. I can still hear the one in the kitchen ring and don't need to get blasted out of my sleep by the one by my bed. Caller ID shows up on all the handsets and you can retrieve messages from any handset. Once you store a name and number it is available on all handsets. Very cool. You can also block any callers that you don't want to hear from again or any callers without caller ID (which is most of the telemarketers)

The only thing I don't like (or need) is the voice that announces the callers ID. It's a mechanical sounding voice and rarely pronounces the names right. Fortunately this is an option that's easy to switch off on any or all of the handsets and the base unit.

I am very happy with this purchase and wish I had done it years ago. You can't go wrong with this system.
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