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

Input:
Product title: Soundstream VDVD311 Single DIN DVD Player AM-FM
Product description: In-Dash Single DIN CD, DVD, DivX Player with Full Function Remote
Product feature: 18 FM / 12 AM Station Memory, DVD/CD/AM/FM/USB/SD, 4 Channel High Power, Remote, Audio Aux-In
Product brand: Soundstream
Target attributes: RMS
Answer: attribute: rms
value: None
source: None