Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Key Connection Battery Free Wireless Optical Mouse & a USB 2' Wired Pad (WLBF20)
Product description: Wireless Battery FREE Mouse & Pad Worlds 1st Battery-Free Optical Mouse - derives its power from the patented RFID-Pad. Wireless optical technology delivers high resolution with pinpoint accuracy. Enjoy a clean organized environment because there are no tangling wires to interfere with your computing experience. Designed with Innovative Radio Frequency Identification Technology, this Battery-Free Wireless Optical Mouse is absolutely Interference-free from any wireless frequency. The RFID Mouse Pad is directly powered from the computer and the mouse creates huge cost savings for its users. The mouse pad transfers instant & constant power to the mouse as a replacement of batteries. This technology avoids unnecessary pollution caused by disposing used batteries into landfills. Mouse pad diameter is 8.86 inches, giving you a 360 degree area for your mouse. Vertical Scroll - Use the index fingertip to scroll the vertical scroll back and forth. Horizontal Scroll - Scroll the page horizontally by using the middle part of your index finger and move to the left and right. With Office Jump Switch, select up to 8 out of 24 various office command sets such as Copy/Paste, Delete/Reply All, and Zoom in/out. The 2nd wheel offers 4 quick functions: H-scroll, zoom in/out, page up/down, pre/next doc. Product Dimension Mouse: 3.82"(L) x 2.18"(W) x 1.27"(H) Mouse Weight: 0.13 Ib. Mouse Pad Weight: 0.27 Ib. Mouse Pad:5.3"(L) x 7.5"(W) x 0.5"(H) Package Weight: 0.95 Ib.
Product feature: Wireless Battery FREE Mouse & Pad Worlds 1st Battery-Free Optical Mouse - derives its power from the patented RFID-Pad. Wireless optical technology delivers high resolution with pinpoint accuracy., Enjoy a clean organized environment because there are no tangling wires to interfere with your computing experience. Designed with Innovative Radio Frequency Identification Technology, it is absolutely Interference-free from any wireless frequency., The RFID Mouse Pad is directly powered from the computer and the mouse creates huge cost savings for its users. The mouse pad transfers instant & constant power to the mouse as a replacement of batteries., This technology avoids unnecessary pollution caused by disposing used batteries into landfills. Mouse pad diameter is 8.86 inches, giving you a 360 degree area for your mouse. Vertical Scroll, Battery Free Wireless Optical Mouse and a USB 2 ft. Wired Pad - Does Not Use Batteries Totally Green Environmentally Friendly Solution, This is an aftermarket of generic part
Product price: $2.54
Product brand: Key Connection
Target attributes: Number of Buttons
Answer: attribute: number of buttons
value: None
source: None