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: NM-1000 Noiseless Wireless Silent Optical Mouse USB Noiseless DPI Adjustable 5 Button Qnix
Product description: Noiseless Wireless Silent Optical Mouse, *With quiet from anywhere,mobile is simple *800 - 1200 - 1600 DPI Adjustable Quantity: 1ea Color: black, reading room,library,conference room,dormitory,etc. 97% Click Noise Down ergonomic,DPI changeable,silent mouse 2.4GHz nano receiver and storage space Subminiature 2.4GHz nano receiver
Product feature: 97% Click Noise Down, It is suitable for use quiet place like church,hospital,conference room,class room, Ergonomic Design Embossing Grip Good and Comfortable Grip feeling, Battery replacement is easy.
Product brand: NM-1000
Target attributes: Connectivity
Answer: attribute: connectivity
value: wireless
source: product title
attribute: connectivity
value: wireless
source: product description