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Compare upper-arm and wrist blood pressure monitors by cuff fit, positioning, display readability, logging, and portability to avoid the wrong home format.
iHealth KN-550BT Extra Large Adult Replacement Blood Pressure Cuff for Big Arms
If you or a family member has larger upper arms, the iHealth Extra Large Replacement Cuff is essential for accurate home blood pressure monitoring. Designed exclusively for the iHealth Track monitor (KN-550BT), this cuff fits arm circumferences of 16.5–18.9 inches (42–48 cm). Using a cuff that's too small can lead to falsely high readings, but this extra large size wraps fully around the arm to properly compress the brachial artery, giving you clinically accurate results.
Installation is simple: just snap the cuff onto your iHealth monitor and adjust it yourself for a snug, comfortable fit. No calibration needed. Whether you're tracking blood pressure daily or monitoring changes over time, this cuff ensures your readings are reliable. The package includes one cuff only, and our California-based customer service team is ready to help if you have questions.
Features
- Wide arm circumference support
- Clinically accurate readings
- Easy self-adjust installation
- 12-month limited warranty
- Exclusive iHealth Track compatibility
General specs
- Brand: iHealth
- Model: KN-550BT
- Seller: Amazon
- ID: B0CB7PY5NJ
- Size: Extra Large Adult
- Brand: iHealth
- Accuracy: Clinically accurate
- Quantity: 1
- Warranty: 12-month limited warranty
- Installation: Easy installation, no calibration needed
- Product Type: Replacement Cuff
- Compatible Model: iHealth Track Smart Upper Arm Blood Pressure Monitor (KN-550BT)
- Arm Circumference: 16.5-18.9 in, 42-48 cm
- First listed by seller: 5/20/26
If you are interested in more details, you can find full information on the seller's page.
Amazon live offers
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New, Used and Refurbished describe the item condition shown for that Amazon offer.
Top live offer
$19.98
Free shipping
New
Third-party seller
FBA
Shippable
Offers updated: 5/31/26
Shipping options
Delivery to 
Russia
Russia
Available
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| Brand | iHealth | Greater Goods | SDUNW | Andesfit | Meraw | huangirl |
| Model | KN-550BT | 0661 | A02-SEB | Cedar | FC-BP130 | |
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| Price | $19.98 | $66.99 | $34.99 | $46.99 | $56.99 | $17.84 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | May 27, 2026 | May 27, 2026 | May 29, 2026 | May 29, 2026 | May 27, 2026 | May 29, 2026 |
| Connectivity | Bluetooth | Bluetooth | Bluetooth | |||
| Display Type | Digital | LED | LED | |||
| Power Source | Battery | 4 AAA batteries (included) or Type-C USB | Battery, Rechargeable Battery | 4 AAA batteries, USB charging cable | ||
| Measurement Location | Upper Arm | Upper Arm | Upper Arm | |||
iHealth KN-550BT Exclusive iHealth Track compatibility
$19.98
When this device makes sense
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