Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Logitech LX8 Cordless Laser Mouse
Product description: LX8 Wireless Optical Laser Mouse, From the Manufacturer, Make the comfortable move to laser precision.
Product feature: Batteries Included - Yes, Batteries Required - Yes, Buttons - 5, Programmable, Color(s) - Black/Blue, Connector/Port - USB
Product brand: Logitech
Target attributes: Sensitivity
Answer: attribute: sensitivity
value: None
source: None