Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: CrispMic USB array microphone
Product description: CrispMic is a highly directional, USB plug-and-play array microphone that provides crisp, clear, noise-reduced speech. Developed by Li Creative Technologies, CrispMic is designed for optimal use with speech recognition software, Skype, conference call software, and VoIP software. Advanced acoustic beam forming and noise reduction on its multiple microphones allow the user to capture clean speech signals regardless of their noisy background environment at home, at work, or outdoors. For more information please visit our product page at www.crispmic.com. CrispMic is portable (3.8 X 1.1 X 0.6 inches), and can be mounted on a laptop or flat screen and includes a stand for easy table-top installation. It also has a built-in DSP processor, so the device does not need to share CPU power with a computer or laptop.
Product feature: 4-sensor microphone array with built-in DSP, USB plug and play; no software required, Portable: clips on laptop/LCD or mounts on stand, Light ON: optimized for speech recognition, Light OFF: optimized for speech communications and VoIP apps, esp. in noisy environments
Product brand: Li Creative Technologies
Target attributes: Diaphragm Size
Answer: attribute: diaphragm size
value: None
source: None