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: SONY Walkman 8GB headphone-integrated NW-WS414 / B (Black)
Product description: Ideal for sports and active lifestyles, this unique digital music player allows you to be wire-free, hands-free, and without distraction whether youre working out at the gym, playing outdoors or even swimming. Ergonomically designed for long-lasting comfort hours on end. Along with a wire-free, secure fit the sports Walkman is guaranteed to never fall out even during the most rigorous physical activities. The NW-WS414 may be compact in size but can store hours of music thanks to the internal 8 GB memory. Designed for athletes in all sports, and for use in salt and fresh water up to two meters deep. Along with being sweat proof and dust proof the sports Walkman is built to endure the toughest training.
Product feature: 8GB Sports Wearable MP3 Player, Waterproof: For use in salt & fresh water up to 2-meters deep, Sweat resistant, dust proof design endures through the toughest training conditions, Ergonomically designed for a secure fit and long-lasting comfort, Ambient noise function so you arent isolated from the world around you, Up to 12-hours playback, Drag & drop from iTunes for Mac or Windows, Playback MP3, WMA, AAC, and Linear PCM Audio Files, Supplied: USB dock, regular & swim earbuds (1set each), adjustment loop, Hi-Speed USB 2.0
Product brand: Sony
Target attributes: Screen Size
Answer: attribute: screen size
value: None
source: None