{
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 "unit_as_designed": null,
 "unit_note": "Count the number of purifiers in the listing, including multi-packs; compare total price divided by that count.",
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    {
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      "Activated carbon",
      "Carbon pellet",
      "Electrostatic",
      "EPA",
      "HEPA H13",
      "Ionic",
      "Nanofiber",
      "Ozone generator",
      "PECO",
      "Photocatalytic",
      "PlasmaWave",
      "Pre-filter",
      "True HEPA",
      "UV-C light",
      "Washable filter",
      "Water-based filter",
      "Other"
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    },
    {
     "name": "Battery size",
     "handle": "battery-size",
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      "10",
      "13",
      "312",
      "395",
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      "14500",
      "16340",
      "18490",
      "18650",
      "21700",
      "1/2AA",
      "2/3AA",
      "1/3AAA",
      "2/3AAA",
      "1/3N",
      "4.5V",
      "6V",
      "9V",
      "12V",
      "3LR12",
      "4LR44",
      "4SR44",
      "6LR61",
      ">100Wh",
      "\u2264100Wh",
      "A",
      "A23",
      "A27",
      "AA",
      "AAA"
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    },
    {
     "name": "Battery type",
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      "Standalone (included)",
      "Standalone (not-included)",
      "Other"
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    },
    {
     "name": "Color",
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      "Black",
      "Blue",
      "Bronze",
      "Brown",
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      "Gold",
      "Gray",
      "Green",
      "Multicolor",
      "Navy",
      "Orange",
      "Pink",
      "Purple",
      "Red",
      "Rose gold",
      "Silver",
      "White",
      "Yellow"
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    },
    {
     "name": "Connectivity technology",
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      "AirPlay",
      "ANT",
      "ANT+",
      "Bluetooth",
      "Cellular",
      "DECT",
      "DVI",
      "Ethernet",
      "GPS",
      "HDMI",
      "Infrared",
      "LTE",
      "Miracast",
      "NFC",
      "Radio",
      "Satellite",
      "USB",
      "Wi-Fi",
      "Wired",
      "Wireless",
      "Wireless dongle",
      "Other"
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    },
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      "A",
      "A+",
      "A++",
      "A+++",
      "B",
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      "F",
      "G",
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      "Built-in",
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      "Tabletop",
      "Undercounter",
      "Wall",
      "Other"
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    },
    {
     "name": "Pattern",
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      "Abstract",
      "Animal",
      "Art",
      "Bead & reel",
      "Birds",
      "Brick",
      "Bull's eye",
      "Camouflage",
      "Characters",
      "Checkered",
      "Chevron",
      "Chinoiserie",
      "Christmas",
      "Collage",
      "Coral",
      "Damask",
      "Diagonal",
      "Diamond",
      "Dog's tooth",
      "Dots",
      "Egg & dart",
      "Ethnic",
      "Everlasting knot",
      "Floral",
      "Fret",
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      "Guilloche",
      "Hearts",
      "Illusion",
      "Lace"
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    },
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     "name": "Power source",
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      "AC-powered",
      "Alcohol",
      "Batteries",
      "Battery-powered",
      "Butane",
      "Charcoal",
      "Cigar lighter",
      "DC-powered",
      "Diesel",
      "Ethanol",
      "Firewood",
      "Gasoline",
      "Hot water",
      "Hybrid",
      "Hydraulic",
      "Infrared",
      "Manual",
      "Mechanical",
      "Natural gas",
      "Oil",
      "Pellet",
      "Pneumatic",
      "Propane",
      "Rechargeable",
      "Solar",
      "USB",
      "Vehicle electrical system",
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     "name": "Speed settings",
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      "Average",
      "Comparing",
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      "Maximum",
      "Minimum",
      "Multiple",
      "Single",
      "Speed without motor assistance",
      "Variable",
      "Other"
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