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: MB Quart DA1-1200.1 Discus Amplifier, 1-Channel 1200-Watt
Product description: Maxxsonics DA1-1200.1 Discus Amplifier 1200 watt mono amplifier. The Discus Series Amplifiers offers an all new ground-up design with focused mass aluminum heat sinks. Our designers & engineers develop only the finest audio products to exceed your needs.
Product feature: 6.5" wide PCB's provide better parts spacing, Ample extrusion length for high thermal performance, Three-stage protection circuits, On-board fusing for all models, Focused mass aluminum heat sinks
Product price: $20.13
Product brand: Hifonics
Target attributes: RMS Power Rating
Answer: attribute: rms power rating
value: None
source: None