Checking the price…
The verdict
FM FM42 Temperature Sensing Color Changing Yin and
ColorTai Ji
GOOD PRICE.
This is a yin and yang pendant necklace with a temperature-sensitive color-changing feature. The small alloy pendant hangs from a stainless steel chain and shifts from black in cold temperatures to different colors as it warms up, making it a novelty piece that responds to your body heat or environment.
$7.98
Amazon price history via Keepa · checked 2d ago · confirm on Amazon
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The read
What's actually worth knowing.
- The color change happens between 57 degrees Fahrenheit and 100 degrees Fahrenheit, so you'll see it shift throughout the day depending on temperature.
- It's quite small at under an inch tall, so it reads more as a delicate accent piece than a statement pendant.
- The pendant is alloy rather than precious metal, which keeps it lightweight but means it's not a long-term heirloom piece.
As of Aug 30, the FM FM42 Temperature Sensing Color Changing Yin and is a good price at $7.98 — versus a $7.84 typical price and a $6.98 12-month low, based on Amazon's own price history.
Its price this year
A fair price — but not a real “sale.”
Sale check Amazon shows “76% off,” measured against a $33 “list price” it doesn't charge. Its usual price is $8 — real discount ≈ 0%.
The phantom Amazon has left this $33 “list price” untouched for 13 months — while the item actually sold for about $8. It's a fixed anchor, not a price it charges.
Prices from Amazon.com · Data sourced from Keepa
The specs
Down to the details.
- Weight
- 0.02 lb
- Colour
- Tai Ji
- Size
- Medium