I was sent another due to the first one not beeping. The second one also does not beep. What am I missing?

I agree that the greatest fault I also have with this item is the very, very hard to hear beep. I suggest you let someone else confirm that it is or is not beeping in a quiet room.. If there are others in the room talking or a radio or TV playing, you are not going to hear it even with normal hearing. You can confirm my opinion by reading this most common compliant for this item. Another alternative to listening for the beep is to wait for 15-20 seconds then read it. It normally is very quick getting a reading. Hope this helps.

I keep getting readings that are about two degrees off. Is this normal?

My readings seem to be accurate. When I'm well, the reading is around the normal of 98.6. I have found that when using a temporal thermometer on my forehead, the readings are 1 to 2 degrees less than I get with an oral thermometer, and that is typical, so if you are comparing the readings from this oral thermometer with readings from a temporal thermometer, you can expect a similar discrepancy.

Any idea of the false positives and false negatives this instrument amassed in any studies the manufacturer may have partaken in?

I don't know but it didn't seem accurate at all and I returned it.

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IPROVEN digital thermometer

Product ID: 63875740

Details

Age Range (Description)
Adult
Brand
iProvèn
Color
Grey
Display Type
Digital
Included Components
Battery Hard
Outer Material
Plastic

🔔fever alarm & smiley indicators

🧴soft, flexible tip for comfort

⏱️10-second rapid reading

S$10

Duties & taxes included

In stock

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Description

⏱️ Fast, Friendly, Family-Approved: Thermometer Tech You Can Trust

RISK FREE CONFIDENCE - Backed by a 100-day refund or replacement policy—no returns needed, just peace of mind.
SPEED THAT SAVES TIME - Get accurate temperature readings in just 10 seconds—because every second counts.
COMFORT MEETS PRECISION - Soft, flexible tip ensures a gentle experience for all ages, from toddlers to adults.
FAMILY READY HYGIENIC - Waterproof tip and easy cleaning make it perfect for safe, shared use across your household.
SMART ALERTS FOR PEACE OF MIND - Fever alarm and smiley indicators take the guesswork out of monitoring health.

The iProven Oral Thermometer DTR-1221A delivers clinically accurate temperature readings in just 10 seconds with a soft, flexible tip designed for comfort. Featuring a fever alarm and smiley indicators, it simplifies health monitoring for the entire family. Waterproof and easy to clean, it’s built for hygienic, repeated use. Trusted by the NY Times Wirecutter and supported by a 100-day no-return replacement or refund policy, it’s the smart choice for fast, reliable fever detection.

Specifications

ASIN	B07BDMGMLY
Additional Features	High Accuracy
Age Range (Description)	Adult
Age Range Description	Adult
Best Sellers Rank	#141,502 in Health & Household ( See Top 100 in Health & Household ) #10 in Rectal Thermometers
Brand	iProvèn
Brand Name	iProvèn
Color	Grey
Customer Reviews	4.2 out of 5 stars 13,961 Reviews
Display Type	Digital
Global Trade Identification Number	08719481723378, 08719699633148
Included Components	Battery, Hard Cover Case, User Instructions
Indoor Outdoor Usage	Indoor
Item Length	5.7 Inches
LowerTemperature Range	32 Degrees Celsius
Manufacturer	iProvèn
Model	BD9635
Model Name	DTR-1221A
Number of Batteries	1 LR41 batteries required. (included)
Outer Material	Plastic
Part Number	DT-R1221A-US-3
Power Source	Battery Powered
Product Care Instructions	Hand Wash Only
Response Time	10 seconds
Reusability	Reusable
Special Feature	High Accuracy
Specification Met	Beep
Style Name	Medical, User-Friendly, Practical, Portable
Unit Count	1 Count
Upper Temperature Range	42 Degrees Celsius

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