Oklar C02 Upper-Arm Blood Pressure Monitor

1 / 7

Product guide

Oklar C02 Upper-Arm Blood Pressure Monitor

The Oklar C02 upper-arm blood pressure monitor is a one-button home device with a backlit LED display and memory for two users. It runs on three AA batteries or the included Type-C cable, but it is not rechargeable.

At a glance

Stores up to 240 readings across two users, with 120 readings per user.
The backlit LED display and single-button controls are designed for quick, straightforward use.
Choose between three AA batteries and Type-C cable power. The unit does not recharge batteries.
The cuff is listed for upper arms measuring 22–40 cm.

Price

$20.94Save 13%

Reference price: ~~$23.99~~

Price checked: Nov 12, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor Pulse Ox, Heart Rate and Fast Spo2 Reading Oxygen Meter with OLED Screen Included Lanyard and 2 X AAA Batteries

$11.99

Non-Contact Forehead Thermometer for Adults and Kids, 1 Second Result | Accurate Reading with Large Display, Mute Mode, Memory Recall, Fever Alarm, Easy to use for Home & Hospital

$9.99

Pros and cons

Pros

Two separate user memory records can help keep household readings organized.
A backlit display with clear digits may be easier to read than a dim, unlit screen.
Battery or cable power gives a choice between portable use and a wired setup.

Cons

The device is not rechargeable, so battery use requires separately supplied AA batteries.
Its stated cuff range ends at 40 cm, limiting fit for larger upper arms.

Technical specifications

11 specifications

Identity
Brand	Shenzhen Jamr Technology Co., Ltd.
Model	C02
Color	White

Measurements and memory
Users and stored readings	Supports two users, storing 120 readings per user
Upper-arm cuff range	8.7 - 15.7 inches (22-40 cm)

Power and operation
Power options	3AA batteries or a Type-C interface
Rechargeable	This product is not rechargeable

Display and measurement
Display	backlit LED screen with clear digits
Operation	one-button operation
Claimed reading time	within 1 minute

Dimensions and installation
Dimensions listed	4.96 x 3.34 x 1.1 inches; 11.64 ounces

What to know before buying

For cable operation without batteries, the listing specifies use of the provided Type-C cable. The cable powers the monitor and does not charge batteries. For measurements, the listing advises sitting with feet flat, supporting the arm at heart level, staying still and silent, and waiting at least three minutes between readings.

Who is it for?

A good fit for

People seeking a simple upper-arm monitor for home tracking.
Two-person households that want separate stored readings.
Users whose upper-arm circumference is within the stated 22–40 cm cuff range.
People who prefer a large backlit display and one-button operation.

Less suited to

People who need a rechargeable monitor or batteries included.
People whose upper-arm circumference exceeds the stated 40 cm maximum.

Oklar C02 Upper-Arm Blood Pressure Monitor · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 14,495 ratings

5 stars71%71%
4 stars12%12%
3 stars5%5%
2 stars3%3%
1 star9%9%

Customer feedback highlights readable digits, portability, quick readings, and usefulness for routine tracking. Accuracy and battery experience are mixed, with reports ranging from accurate readings to inconsistent results and low-battery warnings. Those concerns matter for a monitor intended for repeated home checks. The product listing describes battery or cable power and explicitly says it is not rechargeable, so customer mentions of a rechargeable feature do not match the stated configuration.

Positive themes

Customers describe the display as easy to read and the monitor as portable for travel.
Customers report quick readings and appreciate it for daily tracking.

Mixed feedback

Customer feedback is mixed on accuracy, including reports of inconsistent readings.
Feedback is mixed on battery experience, including reports of low-battery warnings.

Frequently asked questions

Does the Oklar C02 recharge?

No. The listing says it is not rechargeable. It can run on three AA batteries or a Type-C cable, which powers the device but does not charge batteries.

Are batteries included?

The listing says batteries are not included. For battery-free operation, it specifies using the provided Type-C cable.

How many readings can it store?

The listing states it stores up to 240 readings, with 120 assigned to each of two users.

What cuff size does it fit?

The stated upper-arm range is 22–40 cm, also listed as 8.7–15.7 inches.