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: Electrolux Quiet Clean Intelligent Power Unit PU3900C (Canister Vacuums)
Product description: Electrolux PU3900C Central Vacuum Power Unit :, The Electrolux PU3900C is suitable for homes up to 12,000 sq. ft. Equipped with the same performance features as the PU3650B model the Electrolux PU3900C is a towering 640 air-watts giving you more suction power. The PU3900C is an exceptional machine at an exceptional price with a two-stage 7.2 bypass motor giving you even more longevity when it comes to the lifespan of the motor. With a brilliant LED Panel and larger dirt capacity and built-in utility inlet, the PU3900C compliments itself with these breathtaking features. Sleek, Powerful, Innovated Electrolux's PU3650B and PU3900C are designed to provide quality and reliability for years to come., PU3900C Features :, Suction : 137" Air Watts : 640 Home Square Feet : 12,000 Weight : 39 lbs Capacity : 7 Gallons Depth : 14" Height : 42" Motor : 3 Stage Filtration : Self Cleaning HEPA Voltage : 120 Amps : 15 Visual Interface : LCD Product Warranty : 10 Year
Product feature: Electrolux PU3900C
Product price: $15.92
Product brand: Electrolux
Target attributes: Weight
Answer: attribute: weight
value: None
source: None