Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Panasonic KX-T7731 24 Button Display Phone Black
Product description: - Panasonic 24 button speakerphone telephone ~~~with 1 line backlit LCD- Lighted handset ~~~keypad- 24 programmable CO keys- ~~~Speakerphone- Speakerphone key with LED ~~~on/off indicator- Alphanumeric LCD ~~~display- Automatic redial- Hands-free ~~~answer back- Redial/Hold/Flash/Auto ~~~answer/Mute/Store/Message keys- ~~~Inter/conference keys- Forward/do not ~~~disturb keys- Program key- ~~~Pause/transfer key- Volume control keys for ~~~speaker and handset- Wall mountable- ~~~2.5mm Headset jack- BlackKXT7731B
Product feature: 24 programmable buttons, 12 COs & 12 Personal/Feature, and 10 Fixed buttons, 3 Large buttons for hold, transfer, and speakerphone, Navigation key for volume, display, contrast, and function selection, Backlit Dial Keypad and 1 Line Backlit LCD Display, Backlit LCD display shows time, day, month, dialing number and call duration
Product price: $6.19
Product brand: Panasonic
Target attributes: Type
Answer: attribute: type
value: None
source: None