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Klein Tools ET920 USB Power price history, checked Nov 15, 2026: Good price. $78.97 is 6% below the $84.49 it normally sells for, and the lowest we've seen in 142 days.

Klein Tools ET920 USB Power Meter & RT310 Outlet Tester, AFCI and GFCI Receptacle Tester for North American AC Electrical Outlets

In stock

Good price

$78.97 is 6% below the $84.49 it normally sells for, and the lowest we've seen in 142 days.

Now
$78.97
Normally
$84.49
Lowest in 142 days
$78.97(Nov 14)
Highest
$84.49
Evidence: Strong142 days tracked3 price changes

Where today's price sits

View on amazon.com (opens in a new tab)

Prices change. Confirm the price on Amazon before you buy. TrackPin may earn a commission if you buy, at no cost to you; it never changes a verdict.

Get an email when the price drops

Good: 5%+ below normal. Great: 20%+ below. One email when it happens, at a price below today's $78.97. No account, no newsletter.

Amazon price jumps and real deals, posted on X: @trackpindeals (opens in a new tab)

The listing's crossed-out price

Holds up

The listing shows

crossed out: List $84.96 −7%

Against its normal price

−6% vs $84.49

List $84.96 (−7%) holds up: today's price is 6% below normal.

The crossed-out price is the reference shown on the listing. We don't know how it was set; we only compare it with prices we've observed. How we check →

Price history

Tracked since Jun 25 · 142 days · 3 price changes

Ahead of Black Friday 2026 (Nov 27), it is already 6% below its normal price of $84.49. Klein Tools ET920 USB Power Meter & RT310 Outlet Tester, AFCI and… price history, checked Nov 15, 2026: current price $78.97, normal (typical) price $84.49, average $83.38 over 142 days, lowest $78.97 (Nov 14, 2026), highest $84.49 (Nov 3, 2026).

Loading the price chart.

  • Price
  • Normal $84.49
  • 5% or more below normal

How often does it drop below normal?

In the 142 days we've tracked it, it stayed 5% or more below today's normal price for an hour or more twice, typically lasting about 11 days. It's below normal right now.

A count of what happened, not a prediction.

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Get this as JSONThe same verdict and prices, from the TrackPin API.
GET/api/v1/product/B0C7Q9NSZY
Request
curl https://trackpin.co/api/v1/product/B0C7Q9NSZY \
  -H "x-api-key: $TRACKPIN_API_KEY"

This is exactly what the API returns for this product. Free keys include 100 requests a day.

Request a key
Live response, As of 03:48 UTC
{
  "asin": "B0C7Q9NSZY",
  "title": "Klein Tools ET920 USB Power Meter & RT310 Outlet Tester, AFCI and GFCI Receptacle Tester for North American AC Electrical Outlets",
  "image": "https://m.media-amazon.com/images/I/51T2puxta4L._AC_SL500_.jpg",
  "currency": "USD",
  "category": "Home Improvement",
  "category_label": "Tools & Home Improvement",
  "in_stock": true,
  "price": {
    "current_cents": 7897,
    "reference_cents": 8449,
    "discount_pct": 6.53,
    "is_deal": true,
    "observed_at": 1794702697973,
    "changed_at": 1794628692905,
    "checked_at": 1794702697973,
    "source": "stored"
  },
  "verdict": {
    "label": "good",
    "text": "Good price",
    "pct_vs_normal": 6.53,
    "evidence": "strong",
    "stale": false,
    "suspect": false,
    "steady_since": null,
    "sentence": "Good price. $78.97 is 6% below the $84.49 it normally sells for, and the lowest we've seen in 142 days."
  },
  "listing_claim": {
    "label": "List:",
    "listing_reference_cents": 8496,
    "claimed_pct": 7,
    "real_pct": 6.53,
    "class": "holds_up",
    "observed_at": 1794629965045
  },
  "stats": {
    "min_cents": 7897,
    "max_cents": 8449,
    "avg_cents": 8338,
    "history_days": 142,
    "price_levels": 179,
    "price_changes": 3,
    "distinct_prices": 3,
    "lowest_at": 1794628692905
  },
  "history": [
    {
      "price_cents": 7994,
      "from": 1785314029093,
      "to": 1785314029093
    },
    {
      "price_cents": 7994,
      "from": 1785325896585,
      "to": 1788156265954
    },
    {
      "price_cents": 8449,
      "from": 1788171612375,
      "to": 1793198279934
    },
    {
      "price_cents": 8449,
      "from": 1793738366413,
      "to": 1794616726418
    },
    {
      "price_cents": 7897,
      "from": 1794628692905,
      "to": 1794702697973
    }
  ],
  "last_seen": 1794702697973
}
// … 174 more steps in the full response

Normal price: the lowest price level the product held for at least 15% of the last 45 days (about a week). Prices within 3% of each other count as one level, and we use the lowest price in that level. How we calculate it → Prices are observations of amazon.com and may be incomplete or delayed. TrackPin is not affiliated with Amazon.