1 / 7Oklar C02 Upper-Arm Blood Pressure Monitor
The Oklar C02 upper-arm blood pressure monitor is listed with one-button operation, a backlit display, and memory for two users. Its cuff fits upper arms measuring 22–40 cm, and it can run on AA batteries or USB-C power, but it is not rechargeable.
At a glance
- One-button operation is intended to simplify starting a measurement.
- Backlit LED display with large, clear digits for easier reading.
- Stores up to 120 readings for each of two users.
- Works with three AA batteries or the provided Type-C cable, the cable supplies power but does not charge batteries.
- Adjustable cuff is listed for upper arms measuring 22–40 cm.
Reference price: $22.99
Price checked: Nov 11, 2026
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Pros and cons
Pros
- Two-user memory can help keep separate reading histories for household members.
- A backlit display and large digits may be useful for people who find small screens difficult to read.
- USB-C cable power provides an alternative to AA batteries, including when used at home.
Cons
- It is not rechargeable, so battery-powered use requires three AA batteries, which are not included.
- The cuff is not recommended for upper arms wider than 40 cm.
Technical specifications
8 specifications| Brand / listed manufacturer | Shenzhen Jamr Technology Co., Ltd. |
|---|---|
| Model | C02 |
| Dimensions listed | 4.96 x 3.34 x 1.1 inches; 11.64 ounces |
|---|---|
| Cuff range | 8.7 - 15.7 inches (22-40 cm) |
| Operation | One-button operation |
|---|---|
| Display | Backlit LED screen |
| Reading time claim | Readings within 1 minute |
| Battery requirement | 3 AA batteries required. |
|---|
What to know before buying
- The listing calls the product FDA cleared in its title, but the supplied details do not include supporting clearance information, verify the specific claim if it matters to your purchase. For consistent readings, the listing advises sitting with feet flat, keeping the arm at heart level, staying still and quiet, and waiting at least 3 minutes between measurements.
Who is it for?
A good fit for
- People seeking a straightforward upper-arm monitor for home readings.
- Two-person households that want separate stored reading histories.
- Buyers whose upper-arm circumference falls within the listed 22–40 cm cuff range.
- Users who want either battery or cable-powered operation.
Less suited to
- People who need a rechargeable monitor.
- Users whose upper arms are wider than 40 cm.
- Buyers seeking a device with documented smartphone connectivity or data export, neither is specified here.
Customer reviews on Amazon
- 5 stars
71% 71% - 4 stars
12% 12% - 3 stars
5% 5% - 2 stars
3% 3% - 1 star
9% 9%
Customer feedback reports that the large numbers are easy to read and describes the monitor as practical for home or work, portable, and quick to take readings. Opinions on accuracy are mixed, with some customers finding readings accurate and others reporting inconsistency, battery-life feedback is also mixed. Those concerns matter for a monitor intended to track readings over time, and the listing clarifies that this model is not rechargeable. The aggregate rating is 4.3 out of 5 from 14,454 global ratings, but ratings alone do not establish measurement accuracy or explain individual experiences.
Positive themes
- Customers report easy-to-read large numbers.
- Customers describe it as practical for home and work use, portable, and quick to take readings.
Mixed feedback
- Customers report mixed experiences with accuracy, including both accurate impressions and inconsistent results.
- Battery-life feedback is mixed.
Frequently asked questions
Is the Oklar C02 rechargeable?
No. The listing says it is not rechargeable. It can use three AA batteries or the Type-C cable for power, the cable does not charge batteries.
How many readings can it store?
The listing claims storage for up to 240 readings, with 120 readings for each of two users.
What arm size does the cuff fit?
The stated range is 8.7–15.7 inches (22–40 cm) around the upper arm. The listing says it is not recommended for arms wider than 40 cm.
Are batteries included?
The listing says three AA batteries are required and explicitly says batteries are not included. It also refers to an included Type-C cable, so check the selected listing for the package contents.
Alternative options
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AILE FDA Cleared Blood Pressure Monitor - Home Monitoring 2x99 Memory Track | Test at home - accurate readings you can track
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Alcedo Blood Pressure Monitor for Home Use, Upper Arm Cuff BP Machine | Large LCD Screen, Talking Function, 2x120 Memory, Large Cuff (8.7–16.5"), Batteries+USB Cable
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Amazon Basic Care Blood Pressure Monitor, Wide Range Arm Cuff, Intelligent Inflation Technology, Home Monitoring, Hypertension Indicator, Irregular Heartbeat Detection, Large (Previously Healthwise)
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