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: 300K Pixel 431-604 Digital Camera
Product description: This ultra-compact Mini Digital Camera lets you take fun pictures in file sizes that allow easy e-mailing! It also doubles as a webcam for videoconferencing or Web chatting. It includes a USB cable, a user manual, a software CD, and wrist strap. Product Details brand name Crown Edition manufacturer Crown Edition effective megapixels 300K-pixels maximum resolution 640 x 480 viewfinder type optical batteries included no battery type alkaline AAA automatic focus yes movie mode yes self-timer yes weight 6.4 oz Webcam capability yes operating system compatibility Windows 98; Windows 2000; Windows Me; Windows XP memory cards supported none integrated memory 16 MB connector type USB software included yes height 2 3/5 inches width 3 4/5 inches depth 3/4 inches maximum video frame rate 8 fps memory card included n/a sensor type complementary metal-oxide semiconductor (CMOS) number of batteries required 3 color Silver cable type included USB
Product feature: 300,000-pixel CMOS capture device, 16MB SDRAM memory can hold up to 274 low-resolution or 25 high-resolution photos, Camcorder mode lets you capture mini video clips, Self-timer with 10-second delay, 30-second battery-exchange protection gives you a 30-second window in which to insert new batteries, so you won't lose the images you've taken
Product brand: Crown
Target attributes: Optical Zoom
Answer: attribute: optical zoom
value: None
source: None