Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Labtec LCS-1050 Spin 50 2-Piece Computer Speakers
Product description: A stylish audio companion to your PC, MP3 player, or portable CD player, Labtec's LCS-1050 stereo speakers feature 2 watts of total power. These stand-alone speakers are video shielded, so you can position them next to your computer without interference. They have built-in cord storage and bass ports that allow air to move freely for enhanced bass with minimal distortion. There is a headphone jack for private listening., Labtec offers a one-year warranty on parts and labor.
Product feature: 2-watt stereo speakers compatible with any audio product with a 3.5-millimeter jack, Headphone jack on the face makes private listening easy, Bass ports provide bigger bass and richer sound, Built-in cable storage eliminates excess cable clutter
Product brand: Labtec
Target attributes: Use
Answer: attribute: use
value: computer speakers
source: product title
attribute: use
value: pc
source: product description