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: 4) NEW PYRAMID WX65X 6.5" 1200W Car Audio Subwoofers Subs Power Woofers 4 Ohm
Product description: Package Includes: 4 x Pyramid WX65X 6.5" 300W Subwoofers The Pyramid WX65X 6.5" car audio subwoofer features a MAX power handling of 300 watts (1200W per 4 pack) and a RMS power handling of 150 watts (600W per 4 pack). This subwoofer includes a specially treated black rubber edge suspension and a 1.0" high temperature kaptoon voice coil. The mounting depth is 2.76" with a 40 ox. magnet structure. Upgrade your sound with the Pyramid WX65X subwoofer. White Injected Polypropylene Cone Vented Motor Structure Impedance: 4 Ohm<ln 1 buy = 4 subwoofers We are an authorized Pyramid dealer
Product feature: Pyramid WX65X 6.5" 1200 Watt Car Subwoofer (4 Pack), 150 Watts RMS each (600 Watt Total per 4 speakers), 300 Watts Peak each (1200 Watt Total per 4 speakers), White Injected Polypropylene Cone, Specially Treated Black Rubber Edge Suspension
Product price: $2.24
Product brand: Pyramid
Target attributes: Impedance
Answer: attribute: impedance
value: 4 ohm
source: product title
attribute: impedance
value: 4 ohm
source: product description