Wellue CH-S691L Tunnel-Cuff Blood Pressure Monitor

Tunnel-Cuff: The Wellue CH-S691L blood pressure monitor uses a slide-in tunnel cuff for home measurements without wrapping a strap around the arm. It adds separate two-person memory, a three-reading average and rechargeable USB-C power, with a listed adult-arm fit of 7.1–16.5 inches.

At a glance

Slide the arm into the tunnel cuff and press start, avoiding cuff wrapping and straps.
Built-in arm and elbow rests are intended to help with positioning during a measurement.
Stores up to 99 readings for each of two users, with the oldest replaced when that user's memory fills.
Color-coded backlight indicates result categories, and the device averages the last three readings for each user.
Rechargeable design uses USB-C and is claimed to provide up to 210 readings per charge. The armrest folds for storage.

Price

$149.99Save 35%

Reference price: ~~$229.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Slide-in cuff design may be easier to use independently than a wraparound cuff.
Two separate reading memories support keeping records for two users on the same device.
Three-reading averages and the included BP log book offer both device-based and manual tracking.

Cons

Individual readings cannot be deleted. The listing says memory can only be cleared in full.
The listing claims the date and time reset if the emergency stop button cuts power to the internal clock, so it may need setting again.

Technical specifications

12 specifications

Identity
Brand listed	Cemho Medical Technology (Guangdong) Co., Ltd
Model	CH-S691L

Measurement and display
Claimed accuracy	±3 mmHg
Adult arm fit	7.1–16.5 inches
Reading memory	Stores up to 99 readings per user
Users	Two
Average	Automatically calculates the average of the last 3 readings for each user (User A & User B)
Result indicator	green for normal & elevated, yellow for stage1 & 2, red for severe hypertension

Power and dimensions
Charging	USB-C charging
Claimed readings per charge	up to 210 readings
Product dimensions and weight	11.14 x 9.61 x 9.61 inches; 3.53 pounds
Battery listing	1 Nonstandard Battery batteries required. (included)

What to know before buying

The listing describes the device as FDA cleared and states ±3 mmHg accuracy, but these are listing claims, not independently verified here. Its color categories are described as following AHA blood pressure classification and should not replace medical interpretation.

Who is it for?

A good fit for

People who prefer a slide-in cuff and do not want to wrap a cuff around their arm.
Two-person households that want separate stored readings and a recent-reading average.
Home users whose adult arm circumference is within the listed 7.1–16.5-inch fit range.

Less suited to

People who need to remove one particular stored reading without clearing all memory.
Buyers who require app connectivity or wireless data sharing, which are not specified in the listing.

Wellue CH-S691L Tunnel-Cuff Blood Pressure Monitor · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 20 ratings

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The supplied evidence contains aggregate ratings but no written customer feedback. The ratings are uniformly five-star in the reported sample, which is encouraging but limited evidence and does not explain what users liked or establish measurement performance.

Frequently asked questions

How does the cuff work?

The listing describes a tunnel-style cuff. Slide the arm into it, rest the elbow and press start, without wrapping a strap around the arm.

How many readings can it store?

It stores up to 99 readings for each of two users. When a user's memory is full, the oldest reading is replaced by the newest.

Can I delete one reading?

No. The listing says the device can clear all stored memory, but cannot delete a single reading.

Does it calculate an average?

Yes. It is described as displaying the average blood pressure and pulse from the last three measurements for each user.

What should I know about the date and time?

The listing says pressing the emergency stop button cuts power to the internal clock and may reset the date and time. If that happens, set them again.