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: DGL Group, LLC High Speed 4 Port USB 2.0 Hub (VA-4HB-MMI)
Product description: Plug in multiple USB devices conveniently in almost any direction with moveable USB legs.
Product feature: Each USB 2.0 port is capable of data transfers up to 480mbps. Attach card readers, flash drives, mice, keyboards, etc.., This hub wont block adjacent ports., Works best when plugged into a USB 2.0 hub on your notebook/laptop/desktop., Also comes with a micro USB port and an iPhone or iPod compatible port, making it perfect for cellular devices and mp3 devices.
Product price: $5.49
Product brand: DGL Group
Target attributes: Number of Ports
Answer: attribute: number of ports
value: 4 port
source: product title