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: G-Shock Men's GA310 Classic Series Quality Watch - Blue / One Size
Product description: For 25 years Casio G-Shock digital watches are the ultimate tough watch. Providing durable, waterproof mens digital watches for every activity. G-Shock is the ultimate tough watch. It was born from a developer's dream of "creating a watch that never breaks." Guided by a "Triple 10" development concept, the design teams sought a watch with 10-meter free-fall endurance, 10-bar water resistance and a 10-year battery life. The new GA310 series come with large Arabic numerals at 12 and 6 o'clock for an attractive mechanical look and are available in either basic black or bright colors. It also features a high-brightness LED and a multi-dimensional face design that helps to make dial information easier to read. GA310-2A is an analog-digital watch with blue resin band and blue/black face. Shock Resistant 200M Water Resistant Auto LED (High Brightness) 1/100th Second Stopwatch (1,000 Hr)
Product feature: Made in USA, Water Resistant, You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition., Read the full returns policy, Go to Your Orders to start the return, Print the return shipping label, Ship it!, Package Dimensions: 4.3 x 3.8 x 2.6 inches, Shipping Weight: 7.2 ounces ( View shipping rates and policies ), ASIN: B00IMN5NKO, Item model number: GA310-2A, Date first listed on Amazon: February 26, 2014, Average Customer Review: 4.1 out of 5 stars 24 customer reviews
Product price: $129.99
Product brand: Casio
Target attributes: Style
Answer: attribute: style
value: None
source: None