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

Input:
Product title: Genuine FSP ATX-300GU 300W Power Supply (NOT A SUBSTITUTE)
Product description: ATX-300GU 300W Power Supply for PowerMan FSP250-61GT, FSP300-60PLN, ATX-300GU, FSP200-61GT, FSP250-61GN, FSP250-60GRE, FSP300-60PFN, FSP300-60GT, FSP300-60BT, FSP250-60GTW, FSP250-60GTA, FSP300-60ATV, Powertech Systems WK-6200D-3N1-A, Powertronics PK-6145-DT, PK-6145DT-3, Raidmax RD-350W, Sea Sonic SS-250FS, Sparkle, Sun Cheer 230A ATX, SS-250FS, SR -235FS, TTGI TT-300SS, TT-320SS
Product feature: Demand that all competing vendors supply exactly the power supply advertised. Don't let them tell you that you are getting something "better", "upgraded", "higher wattage" or "higher quality". If you do not receive a genuine FSP ATX-300GU then you have been ripped off., ATX-300GU 300W Power Supply for PowerMan FSP250-61GT, FSP300-60PLN, ATX-300GU, FSP200-61GT, FSP250-61GN, FSP250-60GRE, FSP300-60PFN, FSP300-60GT, FSP300-60BT, FSP250-60GTW, FSP250-60GTA, FSP300-60ATV, Powertech Systems WK-6200D-3N1-A, Powertronics PK-6145-DT, PK-6145DT-3, Raidmax RD-350W, Sea Sonic SS-250FS, Sparkle, Sun Cheer 230A ATX, SS-250FS, SR -235FS, TTGI TT-300SS, TT-320SS
Product price: $39.00
Product brand: FSP
Target attributes: Power Output
Answer: attribute: power output
value: 300w
source: product title
attribute: power output
value: 300w
source: product description
attribute: power output
value: 300w
source: product feature