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

Input:
Product title: 300/2v2 JL Audio 2 Channel 300 Watt SLASH Version 2 Amplifier
Product description: Amplifier with 2 Channel
Product feature: 4 Ohms 150Watts x 2 channel, Differential-Balanced inputs, R.I.P.S. Regulated, Intelligent Power Supply
Product brand: JL Audio
Target attributes: RMS Power Rating
Answer: attribute: rms power rating
value: None
source: None