Meet the KAATSU C5, the revolutionary successor to our best-selling C4 model, featuring these powerful upgrades: 

• Longer-lasting, replaceable battery: With the new upgraded C5 battery, you’re getting roughly 50 cycles instead of 30 with the C4. The battery is also replaceable, so you can quickly swap in a fully-charged backup.
• Improved noise-reduction: Using your KAATSU on airplanes and in other quiet settings is now easier thanks to built-in noise reduction.
• Savable Custom Modes: Found the perfect settings for your goals? Save them directly to the device for instant, one-touch access to your favorite custom sessions, every time.
• Longer Device Life: With a replaceable battery and upgraded internal components, the C5 is designed to last longer.
• Lanyard attachment: Wear your device comfortably around your neck with the new lanyard. You can also use the included belt clip, whichever feels best for you. 
• Redesigned AirBands (if selected): The new AirBands feature a more elastic, flexible design that makes them easier to pack and carry when traveling due to new and improved materials.

• KAATSU C5 controller
• Newly redesigned arm and/or leg AirBands (if selected)
• Quick Start Guide
• Carrying case
• USB-C charging cable
• 2 sets of connector tubes (one set for arms and one set for legs)
• Single limb plug
• Lanyard
• Post-purchase education

By completing your purchase, you confirm that you have measured your AirBand size and agree to cover all shipping costs for size exchanges, which are only possible with unused AirBands.

Orders are typically processed within 1–2 business days. International customers are responsible for taxes and duties (not calculated at checkout).

Customer is responsible for credit card processing fees for cancelled orders.

Learn more about our Warranty & Returns Policy.

How is the C5 different from the C4?
The C5 builds on the proven performance of the C4 with major upgrades designed to improve usability and flexibility. It features a larger removable battery, quieter operation, a redesigned user interface, longer device life, customizable sessions with saved favorites, and a more rugged design, giving you greater control and convenience in every KAATSU session.

How is the C5 different from the B2?
The C5 is KAATSU’s most durable system, designed for professional and high-frequency use. It features a rugged build for indoor or outdoor environments and direct control from the device (no phone required). Compared to the wireless B2, which connects via Bluetooth and an app, the C5 offers standalone operation, making it ideal for clinics, teams, and serious users who need precision, durability, and versatility. Check out the Product Comparison page for more details.

Are my old airbands compatible with the C5? Yes. All of our previous C-series airbands work with the C5 (C4, C3, Cycle 2.0, and Nano).

Are the tubes going to get in the way of my workout? 
The connector tubes do add a physical connection between the controller and AirBands, but most users find they do not interfere with typical KAATSU exercises, walking, or rehab movements. The tubes are lightweight and flexible, and many users quickly adapt to them. If you prefer a completely tubeless experience for maximum freedom of movement, the KAATSU B2 may be a better fit.

Will the C5 work with my current C-series AirBands?
Yes. The KAATSU C5 is fully compatible with existing C-series AirBands, so you can continue using your current bands without needing to purchase new ones.

Is KAATSU C5 difficult to use?
No. The redesigned interface makes setup faster and simpler than previous generations.

How do I know what size AirBands to order?
You can view instructions on how to measure yourself on our AirBands page.

Does the KAATSU C5 have Bluetooth?
No. The KAATSU C5 operates as a standalone unit without Bluetooth connectivity. All functions—including selecting modes, adjusting pressure, and running sessions—are controlled directly from the device, ensuring reliable use in any environment without needing a smartphone or app.