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: JVC HAS180A The Amazing On-Ear Headphones, Blue
Product description: Lightweight On-Ear Headphones Colorful lightweight headphones Seamless design On-ear headphones 2-way foldable 30mm driver Black
Product feature: Lightweight On-Ear Headphones, Superior sound isolation from background sound with memory foam earpieces, Cushioned headband, Connectivity Technology : Wired
Product brand: JVC
Target attributes: Style
Answer: attribute: style
value: on-ear
source: product title
attribute: style
value: on-ear
source: product feature
attribute: style
value: on-ear
source: product description