Keanor 331 Fingertip Pulse Oximeter with OLED Display

Keanor 331 is a fingertip pulse oximeter listed for SpO2 and pulse-rate readings. Its claimed four-way rotating OLED display shows a pulse bar and waveform, while one-button operation and included batteries suit straightforward home or travel monitoring.

At a glance

The listing claims SpO2 and pulse-rate readings, alongside a pulse bar and plethysmograph waveform.
A claimed four-way rotating OLED display is intended to make readings easier to view from different angles.
One-button operation and automatic power-off are listed, with compact portable use described for home, gym or travel.
The listing claims Health Canada licensing as a Class II medical device. This is a manufacturer claim, not independently verified here.

Price

$18.99Save 30%

Reference price: ~~$26.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

The waveform and pulse bar add visual context alongside the displayed readings.
Included AAA batteries are stated, so the device is listed as ready to use without buying batteries separately.
One-button operation may be useful for buyers seeking a simple interface.

Technical specifications

8 specifications

Identity
Brand	Keanor
Model	331
Colour	Black

Display and readings
Screen technology listed	OLED
Displayed measurements and indicators	real-time SpO2, Pulse Rate, Pulse Bar, and Plethysmograph (waveform)
Display orientation	4-way rotating OLED screen

Power and dimensions
Batteries	2 AAA batteries required. (included)
Parcel dimensions and weight	8.6 x 6.9 x 4.2 cm; 70 g

What to know before buying

Listing details to confirm

The listing describes SpO2 and pulse-rate measurement but supplies no measurement range, accuracy tolerance or detailed operating conditions. Treat its performance and regulatory statements as listing claims, not independent verification. This does not establish a product defect.

Who is it for?

A good fit for

People seeking a simple fingertip monitor for at-home SpO2 and pulse-rate checks.
Buyers who want an OLED display with a waveform and pulse bar.
People who value a portable unit with batteries listed as included.

Less suited to

Buyers who need published measurement tolerances, ranges or detailed clinical-use specifications before choosing a monitor.
People seeking a monitor with stated Bluetooth connectivity, app support or alarms, none of which are specified here.

Keanor 331 Fingertip Pulse Oximeter with OLED Display · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 112 ratings

5 stars78%78%
4 stars16%16%
3 stars3%3%
2 stars1%1%
1 star2%2%

Customer feedback describes the monitor as easy to use and set up, with positive perceptions of its functionality, speed and accuracy, as well as perceived value. These impressions may matter for routine checks using its listed SpO2 and pulse-rate display, but they do not establish measurement accuracy. Aggregate ratings are mostly five-star, with a smaller spread of lower ratings, and do not explain why customers differed.

Positive themes

Customers describe the monitor as easy to use and set up.
Customer feedback reports quick results and positive impressions of functionality and accuracy.
Some customer feedback characterizes the purchase as good value.