Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: I have the KX-TG4742 phone.  It does not have B at the end.  Will this headset work with my phone?
Document: I bought this item because Panasonic's website listed it as being compatible with the KX-TG76xx series of phones. Well it does work well with the KX-TG7645M (which I also bought on Amazon), IF YOU CAN GET IT TO PAIR! In order to pair this phone with the KX-TG7645M you must set it on the base station itself, and this particular handset WILL NOT connect with the contacts on the KX-TG7645M base station. No contact, no pairing!
I am not too pleased, the phone has an echo and it is really hard to hear the person on the other end.
I'm afraid that this is another poor attempt by Panasonic to make a cordless phone like the great ones (KX-TG2583CB) they used to make.I could easily hold my old model in my hand and easily dial the number. The phone used to be contoured to one's hand with a softer rubber material on the side.
I received my Panasonic KX-TGA470B Extra Handset for 47XX-series Cordless phone from Amazon. My brother gave me the Panasonic cordless base with 3 phones for Christmas and it works great with my other phones in my house. I'm a senior and my brother thought I should have a phone in each room just in case I have a problem and have to call for help so I bought the extra handset.
Phones work great and you can order this to add to the base set as needed. I ordered base set with two phones but then decided I wanted a spare so was able to order just another phone.
I bought the original phone that came with two extra handsets at Costco, and these handsets from Amazon are exactly the same and work great. Nice big numbers, so I can see them without my reading glasses. Need all the help I can get!
We love the functionality and clarity of this headset. We bought it to further expand the phone system base with 3 additional headsets. Works great. No negative comments to offer.
I was very happy with this phone once I figured it out. I plugged it in, to charge it, then tried the directions but it didn't register. I tried it a couple of times but it wouldn't work. (I was using the base and original handset). The programming instructions should specify on 1. Handset  (New)  Then follow the instructions, it worked perfect! Love this phone, it is easy to read and set-up. Shipping was very fast. Would highly recommend.
Purchased this to add to a Panasonic KX-Panasonic Dect 6.0 Plus 3 Handset. Kx-tg242sk, which is identical to thePanasonic KX-TG4772B Dect_6.0 2-Handset 1-Line Landline Telephone. It is very easy to add to an existing Panasonic phone of the same generation (KX-TG4771, KX-4772, KX-4773, KX-TG242SK, or KX-TG243SK).
Both phones have nice features but I would never buy the Panasonic KX-TGA470 or similar again.Some of my AT&T; handsets went bad for some unknown reason (power surge?) They say &#34;connecting&#34; but will not connect to the base station. Good luck with any of these things.
Answer: If yours is the KX-TG4742S, it just means you have the silver case for the phone.  The "B" on this model number is for the black phone.  They are functionally identical and should be interchangeable.  If you have the silver one and want an extra handset and charger to match the rest of your phone set, Amazon carries the KX-TG4742S at Panasonic KX-TGA470S Extra Handset for KX-TG77XX Cordless Phones Series, Silver for a dollar less than this black one.