Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Hifonics ZRX1216.1D 1200 Watt RMS Mono Amp Class D Stereo Amplifier + Wiring Kit
Product description: This Package Includes: - 1 x Hifonics ZRX1216.1D Amplifier - 1 x 4 Gauge Wiring Kit --------------------------- Father of the Gods - Zeus delivers a full range of amplifiers to the mortal car audio enthusiasts of Earth. The Zeus line of amplifiers from Hifonics is a throw back to the original Hifonics amplifiers that helped start the car audio and SPL craze. These amplifiers are packed with technology for great sound and huge power. These high-performance copper wires are wrapped in the durable and flexible SurfaceFlex wire jacket for effective cable routing. The CRB fuse holder has been specially plated with nickel for corrosion protection against the elements. Last but not least, distortion and external noise are reduced to a minimum with the Strand Interaction Conductor. \nWe are an authorized Hifonics dealer!
Product feature: New Hifonics ZRX1216.1D 1200 Watt Mono D Car Amplifier, 400 Watt x 1 Channel @ 4 Ohm, 600 Watt x 1 Channel @ 2 Ohm, 1200 Watt x 1 Channel @ 1 Ohm, Simpatico coil design (SPC) Ultra-Fi Pulse Width Modulated MOSFET power supply
Product brand: HIFONICS
Target attributes: Class
Answer: attribute: class
value: class d
source: product title