A:AnswerHi GF,
1 of your handset does not need an extra charger because the base will serve as it's charger. If you are going to purchase KX-TGA660 separatly, it comes with it's own charger and batteries.
A:AnswerHi Dianne, The difference between the KX-TG 7644M & KX-TG 7644B is only the color of the phone. They are one and the same. M stands for Platinum and B is for black.
A:AnswerHi Pat. Using a touch-tone phone, you can call your phone number from outside and access the unit by entering a 3-digit remote access code to listen to messages or change answering system settings. The default setting is 111. The unit’s voice guidance prompts you to press certain dial keys to perform different operations.